absorption trap acid bottles

Transcription

1 absorption trap Operation: Absorption of noxious acid fumes and gasses without mechanical fume extraction. It is usually used in conjunction with Kjeldahl digestions and Friedel-Craft reactions An apparatus consisting of a bulb trap on top of which is fitted a cylinder comprising of a porosity 1 sintered disc, a drip tube and ground cones and sockets on each component Alternate socket and cone sizes The assembled trap is fitted onto a Kjeldahl flask and the bulb is half filled with a 10% sodium hydroxide solution. Fumes that are evolved force the solution into the cylinder until the level drops below the drip tube in the bulb. Fumes then pass up through the sintered disc which assists absorption by fine division of the bubbles Blocked pores of the sintered disc could cause the apparatus to blow apart CAPACITY ml JOINTS CATALOGUE # 250 B acid bottles Storage of acids and other corrosive liquids Soda-lime glass A bottle with a ground socket neck and penny-head stopper A ground in cap fits over the neck to give added protection against leakage of fumes CAPACITY ml CATALOGUE #

2 adapters - apparatus joint manipulation Connecting dissimilar sized ground joints in apparatus assemblies Addition of spring hooks Keck clip for clamping the joints High vacuum grease Holding springs CONICAL/SPHERICAL ADAPTERS Specific usage: Connecting conical and spherical joints The cone/cup adapter has a cup at the top and cone at the bottom The socket/ball adapter has a socket at the top and ball at the bottom CODE CONICAL JOINTS SPHERICAL JOINTS CATALOGUE # CC3/35 B24 cone S35 cup SB3/35 B24 socket S35 ball EXPANSION AND REDUCTION CONICAL ADAPTERS Specific usage: Expand from socket to cone Reduce from socket to cone The expansion adapter has a large socket at the top and small cone at the bottom The reduction adapter has a small socket at the top and large cone at the bottom CODE JOINTS CATALOGUE # CODE JOINTS CATALOGUE # cone to socket cone to socket XA10 B10 to B DA01 B14 to B XA21 B14 to B DA12 B19 to B XA31 B14 to B DA13 B24 to B XA41 B14 to B DA14 B29 to B XA32 B19 to B B24 to B XA42 B19 to B DA23 B24 to B XA52 B19 to B DA24 B29 to B XA43 B24 to B DA34 B29 to B XA53 B24 to B DA25 B34 to B XA54 B29 to B DA35 B34 to B B29 to B DA45 B34 to B XA64 B29 to B DA48 B50 to B XA74 B29 to B adapters - flexible joint manipulation Usage: Joining misaligned conical joints in apparatus assemblies PTFE Bellows tube with a cone on one end and a socket on the other end JOINTS CATALOGUE # B24 1K1047 B29 1K1048 B34 1K

3 adapters - multiple connection Multiple connection of ground joints in apparatus assemblies Addition of spring hooks Keck clip for clamping the joints High vacuum grease Holding springs The adapter with parallel necks has two sockets at the top and a cone at the bottom The adapter with two necks, one at 45 º, has two sockets at the top and a cone at the bottom The adapter with two necks, one at 15 º, has two sockets at the top and a cone, with a drip-tip, at the bottom The adapter with three necks has two vertical and one at 45 º with sockets at the top and a cone at the bottom TYPE CODE JOINTS CATALOGUE # 2 necks parallel MA1/00 B MA1/11 B MA1/2 B MA1/3 B19/B B19/B MA1/33 B B24/B MA1/44 B necks, 1 at 45 0 MA2/2 B MA2/3 B19/B necks, 1 at 15 0 RA4/11 B RA4/22 B RA4/23 B19/B B24/B necks, 1 at 45 0 MA4/ B B adapters - pourers Facilitate pouring from ground neck bottles and flasks Ground cone fitted with a pouring spout Addition of hooks to hold springs Keck clip for clamping the joints High vacuum grease Holding springs NECK mm CATALOGUE # B B B B

4 adapters - receivers VERTICAL DELIVERY TUBE Specific usage: BENDS Specific usage: FEEDERS Specific usage: Directing delivery and distribution of end product from reactions in apparatus assemblies Addition of hooks to hold springs Keck clip for clamping the joints High vacuum grease Holding springs In conjunction with a distribution chamber to avoid having to interrupt a reaction when a receiving vessel becomes full A socket with a cone underneath and a sideways drip tip Usually at the delivery end of a condenser used angled in an assembly for distributing into a flask. An optional tube prevents vacuum build up A bent tube with a socket at one end and a skirted cone at the other Delivery into vessels allowing receiving vessels to be removed without interruption of reactions with slow delivery A socket with a straight or bent delivery tube TYPE CODE JOINTS CATALOGUE # Vertical delivery RA11/2 B Bend RA9/11 B RA9/22 B RA9/23 B19/B RA9/33 B RA9/44 B Short stem bent feeder RA1/01 B RA1/02 B RA1/03 B RA1/04 B Long stem bent feeder RA1/11 B RA1/12 B RA1/13 B RA1/14 B Short stem feeder - B B B B Long stem feeder - B RA1/22 B RA1/23 B B

5 adapters - stopcocks Connection of stopcocks to ground joints in apparatus assemblies Stopcocks with conical jointed, and/or tubing connection, inlets and outlets Addition of hooks to hold springs Screwthread tubing connector Alternate joints Keck clip for clamping the joints High vacuum grease Holding springs TYPE CODE JOINTS CATALOGUE # Cone and socket EF6T/55 B Cone and socket MF/11/1B B Cone and socket MF/11/2B B Cone and tubing MF/11/3B B Cone and tubing MF/11/4B B Cone and tubing MF/11/5B B Socket and tubing MF14/2 B Distillate FC15/2 B Vacuum/cone TF6/24/2 B adapters - thermometer Introduction of thermometers into apparatus assemblies Cone with thermometer receiving inlet. The insertion and swan-neck adapters have GL14 screw threads for receiving standard width thermometers Addition of hooks to hold springs Alternate joints Keck clip for clamping the joints Thermometer Screwcap for thermometer High vacuum grease Holding springs TYPE CODE JOINTS CATALOGUE # Insertion ST51/13 B14 cone ST52/13 B19 cone ST53/13 B24 cone ST54/13 B29 cone Swan-neck MA6/11 B14 socket & cone MA6/22 B19 socket & cone MA6/23 B19 socket, B24 cone MA6/33 B24 socket & cone Pocket SH4A B14 cone

6 adapters - tubing Receiving and distribution of end product from reactions A cone with or without a socket and a tubing connection olive Alternative screw thread tubing connection Addition of hooks to hold springs Keck clip for clamping the joints Springs High vacuum grease CODE JOINTS CATALOGUE # MF10/1B B14 cone MF10/2B B19 cone MF10/3B B24 cone MF10/4B B29 cone MF10/5B B34 cone MF18/2 B19 cone & socket MF18/33 B24 cone & socket MF18/44 B29 cone & socket aneroid barometer Usage: Measuring atmospheric pressure Wooden case Glass front Stainless steel dial Setting screw CATALOGUE # AB001 arsenic determination set Usage: Components: Operation: Determination of arsenic and antimony Absorption tube 100ml Erlenmeyer flask Alternate size joints Addition of hooks to hold springs The apparatus is designed for the estimation of arsenic by the method that uses the formation of a complex between arsine silver diethyldithiocarbamate with subsequent measurement at 538 nanometers. Arsine is liberated in the flask and reacts with the reagent, that is placed in the limb of the U-tube JOINTS CATALOGUE # B24 ZGA

7 aspirators Usage: Storage and dispensing of liquids. Soda-lime glass Polyethylene Screwcap Spindle valve Stopper Stopcock Carry handles Stopcock BORO-SILICATE GLASS SODA-LIME GLASS POLYETHYLENE STOPPERED SCREWCAP CAPACITY litres CATALOGUE # CATALOGUE # CATALOGUE # CATALOGUE # K K K K1666 SPARE STOPCOCKS GLASS KEY PTFE KEY SPINDLE VALVE PLASTIC NECK CATALOGUE # CATALOGUE # CATALOGUE # CATALOGUE # B19 cone G T V B24 cone G T V B29 cone G T V GL32 4mm bore GL32 8mm bore ¾" BSP thread 1K

8 beakers - glass Usage: Mixing and boiling of liquids. The tall form is usually used in a water or sand bath Graduations Lipped rim Watch glass for cover Brush Stirring rods Magnetic stirrer bars Tongs SQUAT TALL spout TALL no spout CAPACITY ml CATALOGUE # CATALOGUE # CATALOGUE #

9 beakers - glass, special purpose HEAVY WALL Specific usage: JACKETED Specific usage: Specific accessory: PHILIPS Specific usage: Watch glass for cover Brush Stirring rods Magnetic stirrer bars Tongs Boiling and mixing of very corrosive or hot liquids Extra thick glass Graduations Straight rim Spout Maintaining liquids at a constant temperature Rimless tall form beaker inside a closed jacket with standard 9mm water inlet and outlet tubing connection olives Alternate screw thread tubing connections Screw thread tubing connectors Reduction of evaporation due to the smaller surface area for the volume Conical shape Spout Lipped rim HEAVY WALL JACKETED PHILIPS CAPACITY ml CATALOGUE # CATALOGUE # CATALOGUE # beakers - plastic Plastic Spout Lipped rim Graduations Watch glass for cover Brush Stirring rods Magnetic stirrer bars Tongs A 250ml beaker is available in PFA POLYPROPYLENE PMA (TPX) PTFE PFA CAPACITY ml CATALOGUE # CATALOGUE # CATALOGUE # CATALOGUE # 25 1K1801 1K1541 1K K1802 1K1542 1K717 1K K1803 1K1543 1K718 1K K1805 1K1544 1K720 1K K1806 1K1545 1K721 1K K1808 1K1546 1K723 1K K1809 1K

10 beehive shelf Operation: Supporting gas jars in apparatus assemblies for the collection of lighter than air gasses Porcelain The bee hive shelf is usually placed in a trough of water. A bent glass tube from the gas generating apparatus is led under the shelf through the arch. The gas bubbles upwards through the hole for collection SIZE mm CATALOGUE # 40 x bell jar Collecting gasses from a reaction Soda-lime-glass Bell shaped vessel with ground neck and flat flange ground base Penny-head stopper CAPACITY ml CATALOGUE # 2000 BJ bench blotter Usage: Properties: Fluid barrier for laboratory benches; to absorb spillages Blotting paper Super absorbent Impermeable polyethylene backing Ashes readily on incineration AVAILABILITY SIZE m CATALOGUE # Sheet 4.6 x Roll 4.6 x

11 bio steam chambers Usage: Reservoir flask in essential oil distillation apparatus assemblies B34 socket on single neck chamber and B34 angled neck with B24 centre neck on 2 neck chamber B24 cone and short Vigreux column above the cone Alternate cone and socket/s. Addition of hooks to hold springs NECKS CAPACITY ml CATALOGUE # boiling flasks - ground necks Boiling of liquids in apparatus assemblies. They are usually heated by heating mantles, liquid baths or burners. Round bottom flasks can be used under vacuum, but only if the surface of the glass is undamaged Spherical vessel with round or flat bottom Ground neck to receive manipulative conical joints Retaining hooks for springs Stopper Magnetic stirrer bar ROUND BOTTOM FLAT BOTTOM CAPACITY ml NECK mm CATALOGUE # CATALOGUE # 25 B B B B B B B B B B B B B B B B B B

12 boiling flasks - straight necks Boiling of liquids in distillation, reaction, extraction, freeze drying etc. They are usually heated by heating mantles, liquid baths or burners. Round bottom flasks can be used under vacuum, but only if the surface of the glass is undamaged (bruising, scratching, etc.) Round or flat bottomed spherical vessel Narrow or wide neck with lipped rim Addition of side arm for septum Retaining hooks for springs Rubber bung Magnetic stirrer bar Support for round bottom flask Do not use flat bottom flasks under pressure ROUND BOTTOM FLAT BOTTOM CAPACITY ml NECK mm CATALOGUE # CATALOGUE # NARROW NECK WIDE NECK SUPPORT 1B38950 boiling rod Stirring of boiling liquids Rod with tubular end SIZE mm CATALOGUE # 6 x 250 BR2506 bosshead Clamping scaffold components at 90 º Stainless steel Moulded casing with cut-outs at 90 º to each other Thumb screws Retort stand CATALOGUE #

13 bottle top dispensers Dispensing of liquids from bottles PTFE, PFA, FEP and borosilicate glass Specifications: Conforms to DIN Accuracy <+ 0.5% (Nominal volume 2.5ml <+0.6%) Coefficient of variation < 0.1% Completely autoclavable at 121 º C Box contents: Dispenser Telescopic intake tube Three adapters Instruction manual Certificate of conformity Mounting tool Recirculation valve and media-specific recalibration Positive displacement plunger to minimise crystallisation of liquids and clogging with 360º swivel head The Genius and Simplex have variable volume; the Simple Fix has fixed volume. The Genius has a recirculation valve and media-specific recalibration Reservoir bottle of choice Adapter for ground neck bottle GL thread adapter CAPACITY ml & GL THREAD & GENIUS SIMPLEX SIMPLEX FIX GRADUATION ml ADAPTER CATALOGUE # CATALOGUE # CATALOGUE # / GL 28, 40, / GL 28, 40, / GL 28, 40, / GL 32, 38, S / GL 32, 38, S / GL 32, 38, S ,0-10ml GL32 - GL28, 40, For hydrofluoric acid (HF) MICRO PTFE, FEP, ETFE, PFA, borosilicate glass, platinum/iridium. Piccolo 1 GL 28 screwthread. 360 º swivel head Glass dispensing tip Piccolo 2 As for Piccolo 1 Switchable head for choice between two volumes Not suited, among other chemicals, for fuming acids and carbon disulphide MODEL CAPACITY ml CATALOGUE # PICCOLO PICCOLO 2 100/ / / brewer's flask Determination of malts in the analysis of brewer's extracts Straight neck Beaded rim Modified volumetric flask Marks at 500ml and 515ml Ground neck of choice Rubber bung Glass or plastic stopper for ground neck Cleaning brush CAPACITY ml CATALOGUE # brushes Cleaning laboratory ware Nylon bristles on twisted galvanised wire TYPE BRUSH SIZE mm CATALOGUE # Beaker/bottle 50 x Beaker/bottle, black 50 x Beaker/bottle, red 50 x Beaker/bottle, blue 50 x Beaker/bottle, green 50 x Beaker/bottle, yellow 50 x Burette 12 x Swivel head for flasks 45 x 330 1B17068 Test tube 15 x

14 buchner flasks Alternate names: Filter flasks, suction flask, vacuum flask Vacuum filtration and drawing off liquids. Used usually in conjunction with a Buchner funnel or filter (Gooch) crucible Heavy duty boro-silicate glass = Guko - EPDM rubber Conical or bottle shape(3 & 5 litre) Tubing connection olive Straight neck Beaded rim Keck tubing connector assembly Screwthread tubing connector Side-arm socket Guko Tubing Suction pump Rubber bung Buchner funnel FILTECH filter paper Cleaning brush Filter crucible CAPACITY ml NECK mm & GUKO CATALOGUE # or or or or or or SIZE mm CATALOGUE # GUKO No x Operation: No x A Buchner funnel, filter funnel with sintered disc or filter head is fitted in the flask No x neck, using a guko conical rubber gasket, ensuring that the stem of the funnel No x extends beyond the opening of the suction connection. Vacuum tubing is No x attached to the tubing olive or connection. A vacuum is then created in the flask No x by sucking air from the flask using a water jet pump or vacuum pump. Filtration is No x accelerated by the suction created inside the flask. Safety precaution: A tubulature, screwthread tubing connector or a Keck tubing connector assembly is recommended 565

15 buchner funnels Vacuum filtration, generally with a Buchner flask Porcelain, polypropylene, boro-silicate glass Conical shape with a perforated base. The plastic funnel has a detachable top FILTECH filter paper Guko (See buchner flasks) BORO-SILICATE APPROXIMATE PORCELAIN POLYPROPYLENE GLASS CAPACITY ml FILTER PAPER cm INNER DIAM. mm CATALOGUE # CATALOGUE # CATALOGUE # C0a C2 1K K K C C C4a C C6a C8 BUCHNER FUNNEL FILTRATION TECHNIQUES After completion of a reaction, filtration of a mixture will often be necessary to either isolate a solid which has separated out or remove insoluble impurities or reactants, in which case the desired material remains in solution. COLD SOLUTIONS When substantial quantities of a solid are to be filtered from suspension in a liquid, a Buchner funnel of convenient size is employed. Suction causes rapid filtration and results in a more complete removal of the base liquid than in normal atmospheric filtration. Select a filter paper of such size that it covers the entire perforated plate without being folded up against the sides of the funnel (it should be slightly smaller than the plate). Moisten the filter paper with the liquid to be filtered, place it on the perforated plate and apply the suction. The filter paper will adhere firmly to, and completely cover, the plate of the funnel thereby preventing any solid matter from passing underneath the filter paper and into the flask. Pour as much of the liquid into the funnel and allow it to be filtered before transferring the residual slurry into the funnel for filtration. This method allows quicker filtration than if the mixture had been stirred to bring more particles into suspension and pouring it directly unto the funnel. Initial gentle suction leads to more effective filtration than powerful suction which could cause finer particles of solid to be drawn into the pores of the filter paper reducing the rate of filtration. After completion of a reaction, filtration of a mixture will often be necessary to either isolate a solid which has separated out or remove insoluble impurities or reactants, in which case the desired material remains in solution. Any solid remaining in the reaction flask can be easily transferred to the filter funnel by rinsing with a bit of the filtrate and stirring well to remove any solids adhering to the sides of the reaction flask. Be sure to disconnect the pump from the Buchner flask before switching off the pump otherwise suck back will occur and ruin any reaction products in the filtrate. HOT SOLUTIONS Pre-heat the Buchner funnel and use a close-grained, or glass microfibre, filter paper. 566

16 burettes Measured and accurate titration of liquids Specifications: Class A. Calibrated 0.1ml to deliver at a reference temperature of 20ºC Graduated volumetric tube with choice of black or white enamel graduations on standard burettes Stopcock with 2-2.5mm bore glass key or PTFE key or spindle valve Intermediate stopcock with key of choice and spindle valve on the Bang pattern micro burette Schellbach strip (standard with conformity certified burettes) Amberise Double bore stopcock with key of choice Lateral valve GLASS KEY PTFE KEY SPINDLE VALVE CAPACITY ml CATALOGUE # CATALOGUE # CATALOGUE # Standard Conformity certified Micro G 24214T 24214S G 24217T 24217S With intermediate G 24224T 24224S stopcock (Bang pattern) G 24227T 24227S Dispensing (Class B) G 24313T 24313S G 24413T 24413S G 24513T 24513S PLASTIC PVC/PMP/FEP CAPACITY ml CATALOGUE # ACCESSORIES TYPE CATALOGUE # Plastic single 1K139 Plastic double 1K140 Metal, 3-point grip Metal, 4-point grip Retort stand Brush

17 burettes - automated filling - daffert Measured and accurate titration of liquids with automated filling Specifications: Class A. 50ml. Calibrated 0.1ml to deliver at a reference temperature of 20ºC Operation: Graduated volumetric tube with choice of black or white enamel graduations Double bore stopcock Filling cut-out cup Schellbach strip Tubing Aspirator bottle for reservoir Place an aspirator bottle above the burette and attach it to the stopcock side-arm. Attach tubing to the cup side-arm and lead it into a beaker at bench level. Turn the stopcock so that the flow will be through the stopcock side-arm. Fill the aspirator and open the aspirator tap. Allow the burette to fill until the liquid overflows into the beaker. Close the burette stopcock. The liquid level will automatically be at zero. GLASS KEY PTFE KEY CATALOGUE # CATALOGUE # G T burettes - automated filling - digital Specifications: Box contents: Continuous titration of liquids from bottles PTFE/PFA/ FEP and borosilicate glass Conforms to DIN Accuracy <+ 0.2%. Coefficient of variation < 0.1%. Dispensing range: 0.01ml ml. 25ml dispenses 2.5ml and 50ml dispenses 5ml Burette head Telescopic intake tube Three adapters Instruction manual Conformity certificate Two batteries Recirculation valve Calibration buttons Digital display of titrated volume 360 º swivel head Adjustable titrating and intake tubes Thread and adapter GL 32, 38, S 40 Reservoir bottle or flask Adapter for drying tube and filter GL/ground neck adapter CAPACITY ml CATALOGUE #

18 laboratory burettes - automated ware filling, dr. schilling Specifications: Operation: Measured and accurate titration of liquids through a directional spout and automatic filling from a reservoir or plastic burette and plastic auxiliary parts Class B Graduated Schellbach volumetric tube with blue enamel graduations Push-button release valve with directional flow spout Discharge feeder tubing 1000ml reservoir bottle with support base Fill the reservoir bottle with the titrating liquid and gently squeeze the bottle to fill the burette. Excess liquid will drain back into the reservoir GLASS TUBE PLASTIC TUBE CAPACITY ml CATALOGUE # CATALOGUE # burettes - automated filling, pellet Measured and accurate titration of liquids with automated filling to zero Specifications: Class A. 50ml. Calibrated 0.1ml to deliver at a reference temperature of 20ºC Operation: Graduated volumetric tube with black or white enamel graduations Over flow bulb at top of tube B29 cone at bottom of tube Side-arm spindle valve Optional intermediate stopcock Tubing connector Tubing Reservoir bottle Insert the cone of the burette into the neck of the reservoir bottle. Attach the tube of the filler bulb to the tubing connector. Place your thumb over the hole above the tubing connector. Pump the ball to fill the burette. Release the pressure to allow excess liquid to siphon back into the reservoir and set the level in the burette to zero For burette with intermediate stopcock: Empty the burette by opening the intermediate stopcock BLOW BALL FILLER RESERVOIR BOTTLE Natural red rubber Soda-lime glass Rubber tube 2000ml Blow ball B29 neck CATALOGUE # CATALOGUE # 06200C Release valve 569

19 burners Heating apparatus in the laboratory CATALOGUE # BUNSEN Aluminium, brass and steel Powder coated base Flame tube Hose connection Flame-adjust swivel Tubing SPIRIT CATALOGUE # Soda-lime glass Container Polypropylene cap Porcelain wick holder Spirit fuel Spare wicks caps burettes - culture - automated vessels filling, pellet laboratory ware Closing culture bottles CATALOGUE # Dimpled top 33mm diameter neck Collar caps - push-on Closing rimless culture bottles, tubes and flasks CATALOGUE # Blue anodised aluminium Inner spring grip 38mm diameter KAPSENBERG CAPS Aluminium SIZE mm CATALOGUE # Inner spring grip and 18mm diameter Finger grip Release valve 570

20 caps - screw-on Closing laboratory bottles and screw thread tubes Red - ETFE, others - polypropylene Silicone rubber seals THREAD GL14 GL18 GL25 GL32 GL45 COLOUR CATALOGUE # CATALOGUE # CATALOGUE # CATALOGUE # CATALOGUE # Blue Red White Yellow Green Grey Red with hole SEALS WITH HOLE SIZE/HOLE mm CATALOGUE # CATALOGUE # 12/ / / / / / DG SAFETY WASTE CAPS Specific usage: Safely collecting liquid laboratory waste Drip-free collection of aggressive liquids CATALOGUE # Free rotation to enable container change Available with 1, 2 or 3 ports Charcoal filters to prevent gas emissions Stopcock to prevent tube drainage and air trapping Thread adapters Also available for ground neck vessels TAMPER-EVIDENT SCREWCAP Specific usage: Safely close bottles and easily identify any tampering CATALOGUE # Polypropylene Operation: Can be used with all laboratory bottles having a GL45 thread Autoclavable and temperature resistant up to +140 C The cap is screwed tightly onto the bottle and after a soft 'click' the plastic ring is fixed on the bottle neck. When the cap is opened for the first time, the perforation of the plastic ring is broken thus showing that the bottle has been opened Pack size: 10 After the perforation of the plastic ring is broker, the cap may of course still be used as and "ordinary" screw cap 571

21 capsules Ashing of samples SIZE mm CATALOGUE # ROUND 48 x Silica 54 x x x x x x RECTANGULAR 60 x 28 x x 39 x x 42 x x 56 x centrifuge tubes Specifications: DIN (Part 2) for a maximum acceleration of 4000pm and contents with a maximum density of 1.2g/ml Rimless Flame polished edge ROUND BOTTOM CONICAL BOTTOM CAPACITY ml CATALOGUE # CATALOGUE # ZGT ROUND BOTTOM Polypropylene Lipped rim CAPACITY ml SIZE mm CATALOGUE # 7 100x12 1K x18 1K x24 1K x30 1K x35 1K x40 1K308 CONICAL BOTTOM POLYPROPYLENE POLYPROPYLENE PMP (TPX) GRADUATED GRADUATED CAPACITY ml SIZE mm CATALOGUE # CATALOGUE # CATALOGUE # x16 1K300 1K2300 1K x18 1K301 1K2302 1K

22 ceran heating plate Usage: On a quadruped for protection, even distribution of heat and avoidance of soot A better alternative to gauze wire supports with problem-free cleaning Specifications: Plate: Glass ceramic Holder & quadruped: Chrome/nickel steel Application range from -200 º C to +700 º C Extremely low expansion Very resistant to thermal shock Plate holder Bosshead Quadruped. Retort stand. ITEM CATALOGUE # 135x135mm plate Holder Quadruped chromatography Usage: Liquid/solid column chromatography Stopcocks with glass keys Ground sockets and cones Por. 0 sintered disc GL18 screwcap Alternate sockets and cones PTFE-key stopcock Built in 250ml reservoir Spindle valve Tamping rod Flask or bottle for spray head Solvents Packing adsorbents, i.e. aluminium oxide Dropping funnels can be used as solvent reservoirs TYPE CATALOGUE # 30ml, P1 filter disc Socket & cone Stopcock and socket Stopcock, sock and cone Adjustable spray head Column holder

23 claisen flasks Usage: Distillation apparatus assemblies Pear shape Two vertical B14 sockets for thermometers, dropping funnels etc. B14 side cone for condenser, receiver etc. Alternate sockets and cone CODE CAPACITY ml CATALOGUE # MD3/ MD3/ MD3/ claisen-vigreux flasks Usage: Distillation fractionating apparatus assemblies Pear shape Two vertical B14 sockets for thermometers, dropping funnels etc. Built-in fractionating column B14side cone for condenser, receiver etc. Alternate size sockets and cone CODE CAPACITY ml CATALOGUE # MD4/ MD4/ MD4/

24 clamps and clips Usage: Clamping and holding of laboratory apparatus Stainless steel SIZE NS mm CATALOGUE # BALLCUP CLAMP Tightening screw Spring loaded EXPANDING RETORT CLAMPS CATALOGUE # Thumb screw 3-JAW Cork- or plastic-lined jaws 4-JAW Bosshead (required) QUICK RELEASE FLAT-FLANGE CLAMP SIZE mm CATALOGUE # Screw fastening Release lever Three retaining clips TUBING CLAMPS: MAXIMUM TUBING HOFFMAN HOFFMAN DIAMETER mm CATALOGUE # Thumb screw clamp Hinged bottom bar MOHR MAXIMUM TUBING MOHR Squeeze to open DIAMETER mm CATALOGUE # Spring-loaded

25 clamps and clips for glass joints Usage: Clamping and holding of laboratory apparatus POM KECK for conical joints Operation: Locate the wide end of the clip with the wide end of the joint and snap the clip over the cone and socket to hold them together COLOUR TO FIT JOINT CATALOGUE # SET B10 to B Turquoise B Violet B Yellow B Blue B Green B Red B Orange B Yellow B Brown B KECK for spherical joints COLOUR TO FIT KS JOINT CATALOGUE # Violet 13/ Light blue 19/ Dark red 29/ Orange 35/ clevenger trap Usage: Distillation apparatus assemblies CATALOGUE # Built-in Liebig condenser Standard 9mm tubing olives Glass-key stopcocks Ground cones and sockets of choice Stopcock with PTFE-key Spindle valve Screwthread tubing connectors. Tubing Keck clips 576

26 cold traps VACUUM TRAP Specific usage: Operation: CONDENSATION TRAP Trapping of condensation and prevention of it escaping into the system In vacuum apparatus assemblies to prevent entrainment of volatile materials from damaging pumps etc. Usually used in a train Ground sockets of choice. Jacketed conical tube Load the vessel with a suitable refrigerant such as dry ice. Volatile materials passing through the assembly freeze onto the cold surface 90 º bend U-bend with spindle valve to easily drain off contaminants CATALOGUE # Bulb containing hook shaped tube Ground cone of choice CATALOGUE # IMMERSION TRAP Specific usage: In vacuum apparatus assemblies to prevent corrosive vapours etc. May also be used as an absorption trap Kjeldahl digestions from damaging pumps Tube CATALOGUE # Ground cone and socket of choice Operation: Immerse the trap into a Dewar vessel containing a suitable refrigerent such as dry ice. Volatile materials passing through the assembly freeze onto the cold surface 577

27 combustion boats Combustion and weighing of dry samples Porcelain and silica Finger grips PORCELAIN LENGTH mm WIDTH mm CATALOGUE # SILICA LENGTH mm WIDTH mm CATALOGUE # combustion tube Combustion of small amounts of solids. Can also be used as a drying tube or screwthread connector in apparatus assemblies Screwcap with hole Threaded ends Keep direct heat way from caps. Avoid temperatures above 500ºC as glass could distort LENGTH mm DIAMETER mm CATALOGUE # condensers - coil COIL-DISTILLATE Specific features: Reflux or distillation applications in apparatus assemblies Two 9mm tubing olives Ground cone and optional socket Alternate effective lengths to suit requirements. Alternate screwthread tubing connection with connector for safety and convenience Alternate size sockets and cones. Distillate coil Coolant jacket Equal size joints CODE JOINT/S EFFECTIVE CATALOGUE # LENGTH mm B B

28 condensers - coil DALIN Specific features: Operation: Coolant coil Distillate column Flooding protector Equal size joints The bypass prevents flooding in the condenser CODE JOINT/S EFFECTIVE CATALOGUE # LENGTH mm QC-4080 B DIMROTH Specific usage: Specific features: For dry ice or solid coolants Coolant coil Distillate column Water inlet and outlet both at the top Equal size joints Water connectors can be optionally placed on the same side or opposite each other CODE JOINT/S EFFECTIVE CATALOGUE # LENGTH mm B B B B ETHER Specific usage: Specific features: Operation: For dry ice or solid coolants. Condensing very volatile liquids Inner coolant coil Outer coolant jacket Distillate column Four hose connectors. The main cooling surface area is jacketed by a Liebig type condenser, that is cooled by a separate water supply, preventing vapour from creeping around the outside of the coil. CODE JOINT/S EFFECTIVE CATALOGUE # LENGTH mm C11/23 B24 cone & B19 socket

29 condensers - coil GRAHAM Specific features: Operation: Coolant coil Distillate column Equal size joints The internal coils give an increased cooling surface CODE JOINT/S EFFECTIVE CATALOGUE # LENGTH mm C3/12 B C3/13 B C3/14 B C3/22 B C3/23 B C3/24 B JACKETED COIL Specific features: Coolant coil Distillate column Outer coolant jacket Equal size joints Water inlet and outlet both at the top Water connectors can be optionally placed on the same side or opposite each other CODE JOINT/S EFFECTIVE CATALOGUE # LENGTH mm CX6/22 B CX6/33 B CX6/44 B MULTI COIL Specific features: Coolant coil Distillate column Equal size joints CODE JOINT/S EFFECTIVE CATALOGUE # LENGTH mm C13/55 B C13/55/2 B

30 condensers - coil REVERSIBLE COIL Specific features: Operation: Coolant coil Distillate column Two cone joints The internal coils give an increased cooling surface CODE CONE JOINTS EFFECTIVE CATALOGUE # LENGTH mm CX3/23 B19 & B CX3/35 B24 & B THORPE (INLAND REVENUE) Specific usage: Testing and control methods by brewers and distillers and removing condensable vapours from non-condensable gases Specific features: Operation: Distillate coil Coolant jacket Water inlet and outlet both at the top Equal size joints Water connectors can be optionally placed on the same side or opposite each other Vapour and distillate traverse down through the coil Not recommended for fast rates of distillation CODE JOINT/S EFFECTIVE CATALOGUE # LENGTH mm C6/13 B TWIN COIL Specific usage: Specific features: When maximum efficiency is required Two coolant coils Separate water inlets and outlets Distillate column Equal size joints CODE JOINT/S EFFECTIVE CATALOGUE # LENGTH mm C4/13 B

31 condensers - immersion COLD FINGER Specific usage: Specific features: Operation: Immersion into distillation assemblies, etc. Jacketed tube Cone Water inlet and outlet Refluxing can be regulated by adjusting the air or water flow through the condenser CODE JOINT/S EFFECTIVE CATALOGUE # LENGTH mm FC14/00 B condensers - jacketed ALLIHN Specific features: Operation: Bulb distillate chain Outer coolant jacket Equal size joints The internal bulbs give an increased cooling surface CODE JOINT/S EFFECTIVE CATALOGUE # LENGTH mm CX7/33 B DAVIES Specific features: Operation: Distillate column Coolant bulb Outer coolant jacket Equal size joints The outer cooling surface prevents creep and loss of vapour with liquids that have low boiling points CODE JOINT/S EFFECTIVE CATALOGUE # LENGTH mm C5/11 B C5/12 B C5/13 B C5/22 B C5/23 B C5/24 B DEWAR Specific usage: Specific features: For dry ice or solid coolants Coolant chamber Distillate jacket Equal size joints CODE JOINT/S DEPTH mm CATALOGUE # QC-5015 B

32 condensers - jacketed FRIEDRICH'S Specific features: Operation: Inner coolant chamber Helical indentations Equal size joints The helical indentations inside the cooled surface promote turbulent flow with increased heat transfer and efficiency. Creeping of vapour is avoided because of the minimum annulus between the cooled surface and the outer jacket CODE JOINT/S EFFECTIVE CATALOGUE # LENGTH mm C10/22 B LIEBIG (WEST) Specific features: Distillate column Outer coolant jacket Equal size joints CODE JOINT/S EFFECTIVE CATALOGUE # LENGTH mm C1/00 B C1/11 B C1/12 B C1/13 B C1/14 B condensers - tube Specific features: Specific usage: Distillate column Equal size joints AIR Simple condensation of substances with boiling points above 150ºC AIR REFLUX Reflux work with block heaters CODE JOINT/S EFFECTIVE CATALOGUE # AIR LENGTH mm C2/12 B C2/11 B FC7/23 B C2/22 B FC7/43 B AIR REFLUX C2/1 B C2/3 B

33 conical measures Wider surface area for easier decanting from a larger vessel Polypropylene and PMP Wide base for stability Graduated POLYPROPYLENE PMP (TPX) CAPACITY ml GRADUATIONS ml CATALOGUE # CATALOGUE # K422 1K K423 1K K424 1K K425 1K1425 crucibles Melting dry chemicals, metals and minerals Tongs Triangles Gloves Hot grips Alsint 99.7(alumina, aluminium oxide) CAPACITY ml CATALOGUE # A A A A A Porcelain LOW FORM MEDIUM FORM TALL FORM CAPACITY ml CATALOGUE # CATALOGUE # CATALOGUE # a 0779MF MF MF7 0779C MF7a C MF6 0779C a 0779MF6a 0779C MF C MF MF C MF MF MF1a 584

34 crucibles Melting dry chemicals, metals and minerals Tongs Triangles Gloves Hot grips Lids *included with & Muffle tray for Silica COKING (VOLATILE)* LOW FORM TALL FORM MUFFLE TRAY CAPACITY ml CATALOGUE # CATALOGUE # OPEN END TRAYS SWELLING MOISTURE* ROGA Zirconium Zirconium Specifications: Melting point 600ºC - 700ºC CAPACITY ml CATALOGUE # 35 08K K K452 TONGS Stainless steel Bow for easy grip Turned up ends SIZE mm CATALOGUE # TRIANGLES Ceramic and galvanised wire Tube mounted on twisted wire Tripod (required) SIZE mm CATALOGUE # PIPE CLAY SILICA 50 08S

35 crucibles - lids Finger grip TO FIT CRUCIBLE DIAM. mm CATALOGUE # PORCELAIN 0779MF D a, 0779C0, 0779MF D , 0779C1,07 79MF D , 0779C2, 0779MF7a D7a 07791, 0779C3, 079MF D , 0779C4, 0779MF5, 0779MF6a D A, 0779C5, 0779MF D , 0779MF3, 0779MF D , 0779MF D1 0779MF1a D10 SILICA crystalising dishes Crystallisation of solids. Receptacle for desiccant in desiccators CAPACITY ml CATALOGUE # Beaded rim Spout culture bottle - breed-demeter Developing cultures in a growing media and storage Square Flanged lip on neck Rubber bung (21x25x30) Cotton wool plugs can be used for closing CAPACITY ml SIZE mm CATALOGUE # x

36 culture bottles LONG NECK Developing cultures in a growing media and storage Straight flame-polished rim Choice of 16mm or 18mm neck size Kapsenberg cap (as shown) CAPACITY ml SIZE mm CATALOGUE # 50 40x x x MEDIA Straight flame-polished rim Choice of 16mm, 18mm, 31mm or 38mm neck size Kapsenberg cap Blue anodised aluminium cap Glass cap Rubber bung CAPACITY ml SIZE mm CATALOGUE # FOR GLASS CAP x x x WITH BEADED RIM x FOR RUBBER BUNG x x FOR METAL CAP x x x

37 culture flasks ERLENMEYER-TYPE Culture preparations when a large, flat bottom surface is required for growing cultures to a uniform thickness Straight flame-polished rim 38mm wide neck size for blue anodised aluminium cap Choice of 16mm or18mm narrow neck size for Kapsenberg cap Kapsenberg cap Blue anodised aluminium cap Rubber bung WIDE NECK NARROW NECK CAPACITY ml CATALOGUE # CATALOGUE # FERNBACH Straight flame-polished rim 38mm wide neck size for blue anodised aluminium cap Blue anodised aluminium cap Rubber bung CAPACITY ml SIZE mm CATALOGUE # x culture tubes Culture preparations and storage Straight rim for Kapsenburg cap crew thread for screwcap Kapsenburg cap Red screwcap Rubber bung SCREW THREAD STRAIGHT RIM CAPACITY ml DIAM. x LENGTH mm CATALOGUE # CATALOGUE # x x x x

38 culture tubes - single use Culture preparations and storage Soda-lime glass CAPACITY ml DIAM. x LENGTH mm CATALOGUE # Screw thread x Black screwcap x x Pack size: x SINGLE USE Polystyrene Screw thread Screwcap The 15ml has a flat base CAPACITY ml DIAM. x LENGTH mm CATALOGUE # x 90 06Z10PSNL Pack size: x Z5PSNL cuvettes Holding samples for spectroscopic experiments Polystyrene For single use Pack size: TYPE SIZE mm CATALOGUE # For Olli-C-Analyser x K2618 For Fibrintimer 11.9 x K2630 For Amelung 18.65/11.25 x K /11.25 x K

39 desiccators - glass Alternate names: Drying chamber Cooling of heated substances and for the storage of dry substances that must not be exposed to the moisture normally present in the atmosphere and soda-lime glass Base with flat flange Lid with matching flat flange Choice of glass or PTFE key or spindle valve stopcock in the lid of the vacuum desiccator Porcelain, plastic or metal perforated desiccator plate Crystalising dish to hold desiccant High vacuum grease for sealing the lid to the base Desiccant Suggested: silica gel orange, calcium chloride anhydrous and phosphorous pentoxide Operation: A desiccator is an airtight container which maintains an atmosphere of low humidity through the use of a suitable drying agent which occupies the bottom part of the desiccator. An ignited crucible or other very hot object should be cooled for about one minute before being placed into the desiccator on a perforated plate. In either case, the lid of the desiccator should be slightly ajar for 30 seconds prior to complete closing. This will prevent a partial vacuum from forming as the heated air cools. If such a vacuum forms it might become very difficult to remove the lid without upsetting the samples within. A dried sample should remain in the desiccator for at least 5 minutes before being weighed. If the sample is to remain in the desiccator for an extended period of time before weighing, the top of the weighing bottle of the lid of the vial should be put in place after 10 minutes of cooling. An airtight seal is maintained by applying a small amount of silicone grease to the flanged surfaces where the lid and body of the desiccator meet. Once the desiccant has been added, the lid to the desiccator should not be removed any more than is necessary Drying agents should not be placed directly in the desiccator but rather in a crystalising dish SODA-LIME GLASS BORO-SILICATE GLASS PLAIN VACUUM PLAIN VACUUM SIZE mm PLATE mm CATALOGUE # CATALOGUE # CATALOGUE # CATALOGUE # SPARE STOPCOCKS Straight shank glass key 24149G Straight shank PTFE key 24149T B24 cone glass key G B24 cone PTFE key T B24 spindle valve

40 desiccators - plastic Alternate names: Drying chamber Cooling of heated substances and for the storage of dry substances that must not be exposed to the moisture normally present in the atmosphere Polycarbonate and polypropylene Base with flat flange Lid with matching flat flange PTFE stopcock in the lid of the vacuum desiccator Polypropylene perforated desiccator plate Crystalising dish to hold desiccant High vacuum grease for sealing the lid to the base Desiccant Suggested: silica gel orange, anhydrous calcium chloride, phosphorous pentoxide Operation: See previous page LARGE INTERIOR VOLUME -- The space saving design of the desiccator dome provides maximum interior clearances. They provide an average of 13% greater interior volume than standard hemispherical domes. EXTRA HEAVY WALLS -- Clear polycarbonate top and white polypropylene or polycarbonate PLAIN VACUUM VACUUM* SIZE mm CATALOGUE # CATALOGUE # CATALOGUE # 150 1B B B B B B B B B K554 desiccators - plates Supporting samples in desiccators Perforated The porcelain and plastic plates have a centre finger hole for lifting POLYPROPYLENE PORCELAIN METAL DESICCATOR SIZE CATALOGUE # CATALOGUE # CATALOGUE # C K C K C K C C

41 digestion tubes To suit different applications and manual/automatic handling systems The Bruker and Rangmat have flat bottoms and in addition the Rangmat bottom is concave CAPACITY ml DIAM. x LENGTH mm CATALOGUE # PLAIN x x x x x KJELDAHL x x x BÜCHI x BRUKER x RANGMAT x dissolution vessel Specific usage: Tablet dissolution in a dissolution bath in the pharmaceutical industry 16mm flat flange Amberisation CAPACITY ml DIAMETER mm CATALOGUE #

42 distilling flasks Distillation applications Round bottom Long neck Side arm Beaded rim Ground socket on neck Ground cone on side arm CAPACITY ml NECK mm CATALOGUE # ENGLER - ASTM distilling receivers Specific usage: Distillation apparatus assemblies 24248: Determination of water content in petroleum products with solvent entrainers that are lighter than water 24241: Determination of water content in petroleum products with solvent entrainers that are heavier than water and for estimation of oil content 24247: Vacuum distillation where it is desirable to change flasks without disturbing the vacuum within the system Ground cones and sockets - choice of sizes Glass key stopcocks Standard 9mm tubing olives on PTFE-key stopcock Spindle valve Screwthread tubing connectors CATALOGUE # Bidwell-Sterling Dean and Stark, light entrainer with stopcock Heavy entrainer Heavy entrainer with stopcock and thermo socket Modified Bidwell-Sterling with solvent return tube Dean and Stark with stopcock and return tube Perkin

43 distribution chamber Alternate names: Vacuum receiver Connection of four flasks to a condenser outlet under vacuum in an assembly B19 and four x B14 joints ground cones and sockets Standard 9mm tubing olive Alternate socket and cones Screwthread tubing connector Delivery adapter as shown CATALOGUE # Flasks Operation: Rotate the delivery adapter to empty into different limbs thus filling the receiver flasks without interruption dropping bottles Storage and dispensing of small amounts of liquids Soda-lime glass Ground neck socket Dropping pipette with ground cone Rubber teat Screwthread neck on Rubber teat in screwcap on CLEAR AMBER AMBER OVAL POLYSTOPPER CAPACITY ml CATALOGUE # CATALOGUE # CATALOGUE # CATALOGUE # Polyethylene Screw cap with dropper insert Dropping pipette with rubber teat CAPACITY ml CATALOGUE # RANVIER TYPE 50 1K K K K K

44 dropping funnels Addition of measured amounts of liquid at a set rate. Solvent reservoir in chromatography. Can also be used as a separating funnel Ground cones and sockets Glass key stopcocks Glass stopper with vent hole Alternate socket and cone sizes Open top Without ground cone Spindle valve Plastic stopper Cleaning brush GLASS KEY PTFE KEY CAPACITY ml SOCKET & CONE CATALOGUE # CATALOGUE # 50 B G T 100 B G T 250 B G T 500 B G T 1000 B G T 2000 B G T drying towers Drying of gasses Column on base Base outlet of choice Standard 9mm tubing olives on Type B Height 250mm Alternate ground socket size B14 bottom socket on Type A Screwthread tubing connectors on Type B Plastic stopper B34 glass stopper with vent hole Cleaning brush CATALOGUE # Type A 24038A Type B 24038B B34 tubing adapter B34 stopcock adapter B14 stopcock adapter

45 drying tubes Drying of gasses by passing over a desiccant Ground cones on straight tubes Ground sockets on U tubes Effective length of 100mm Side arms on Alternate sockets and cones Glass key stopcocks on Alternate screwthread connectors on Desiccant, i.e. sodium chloride CATALOGUE # Angled with B14 cone Angled with B19 cone Angled with B24 cone Straight with B14 cone Straight with B19 cone Straight with B24 cone U with B14 sockets U with B19 sockets U with B24 sockets U with sidearms

46 erlenmeyer flasks - glass Alternate names: Operation: Conical flasks Boiling and swirling of liquids. Receiving components in apparatus assemblies. Can also be used as culture flasks White enamel graduations Lipped rim Ground neck on series Screwthread neck on series Retaining hooks and springs on series Magnetic stirrer bar Plastic or glass stopper for ground neck Rubber bung Red screwcap for series Cleaning brush The conical shape greatly reduces the tendency for precipitates to stick to the inside surface as they slide down the wall NARROW NECK WIDE NECK CAPACITY ml NECK SIZE mm CATALOGUE # NECK SIZE mm CATALOGUE # GROUND NECK SCREWTHREAD NECK CAPACITY ml NECK SIZE mm CATALOGUE # NECK SIZE mm CATALOGUE # 25 B B GL B B B GL B B B B GL B B B GL B B B GL B B B GL B B B

47 erlenmeyer flasks - plastic Alternate names: Conical flasks Boiling and swirling of liquids. Receiving components in apparatus assemblies. Can also be used as culture flasks Polypropylene and PMP(TPX)) Red enamel graduations on polypropylene flasks Blue enamel graduations on PMP(TPX)) flasks Straight neck on 1K146 series Screwcap on 0666 series Plastic stopper as alternate to screwcap Rubber bung for 1K146 series and as alternate to screwcap Cleaning brush POLYPROPYLENE POLYPROPYLENE PMP (TPX) Threaded neck Straight neck CAPACITY ml CATALOGUE # CATALOGUE # CATALOGUE # 50 1K K K K K K1465 evaporating dishes Evaporating of liquids, polypropylene, porcelain and silica Beaded rim Spout CAPACITY ml RIM DIAM. Mm CATALOGUE # GLASS PLASTIC PORCELAIN SILICA FLAT FORM ROUND BOTTOM FLAT FORM DIAMETER mm CATALOGUE # CATALOGUE # CATALOGUE #

48 extraction flask Alternate names: Mojonnier flask Extraction of fat from milk and milk products Beaded rim Rubber bung SIZE mm CATALOGUE # 160x extraction tube In the mining industry. Capillary extrusion at top Round bottom CATALOGUE # extractors - liquid/liquid BAFFLE DISC TYPE Specific usage: Operation: Solvent extraction in liquid/liquid separation processes Ground cone and socket Distributor that fits inside the extractor body Alternate size cone and socket Retaining hooks and springs Keck retaining clips Continuous operation for volumes of 10ml to 500ml. Condensed solvent falls onto the baffles and is broken into small droplets which are distributed through the liquid sample and extract the desired components and/or contamination. The solvent then returns to the boiling flask by way of the tube on the side of the extractor CODE CAPACITY ml SOCKET & CONE CATALOGUE # EX10/23 60 B45 & B EX10/20 Distributor

49 extractors - liquid/liquid LIGHT PHASE Specific usage: Solvent extraction in liquid/liquid separation processes Ground cone and socket Distributor that fits inside the extractor body Alternate size cone and socket Retaining hooks and springs Keck retaining clips Continuous operation light phase extraction for volumes of 10ml to 500ml CODE CAPACITY ml SOCKET & CONE CATALOGUE # EX8/ B EX8/20S Distributor EX9/ B34 & B EX9/30S Distributor HEAVY PHASE Specific usage: Continuous operation heavy phase extraction for volumes of 500ml to 2500ml CODE CAPACITY ml SOCKET & CONE CATALOGUE # EX10/ B EX12/33S Distributor B24 & B extractors - liquid/solid Solvent extraction in liquid/solid separation processes Ground cone and socket Separate distributor support inside the extractor body Alternate size cone and socket Retaining hooks and springs Keck retaining clips Thimbles CODE CAPACITY ml SOCKET & CONE CATALOGUE # EX7/13 60 B34 & B FC8/ B34 & B EX13 Distributor support

50 extractors - liquid/solid Solvent extraction in liquid/solid separation processes Ground socket and cone with drip tip Inner liner with integral siphon tube Alternate size cone Retaining hooks and springs Keck retaining clips CODE CAPACITY ml SOCKET & CONE CATALOGUE # EX7/13 20 B34 & B EX7/10 Liner EX7/23 50 B45 & B EX7/20 Liner EX7/ B55 & B EX7/30 Liner extractors - soxhlet, liquid/solid Soxhlet solvent extraction in liquid/solid separation processes Ground cone and socket Siphoning tubes Flat flange body and lid with retaining clip allows insertion of large thimbles Alternate size cone and socket Retaining hooks and springs Keck retaining clips Thimbles CODE CAPACITY ml SOCKET & CONE CATALOGUE # EX5/21 5 B19 & B EX5/32 20 B24 & B EX5/43 40 B29 & B EX5/53 60 B34 & B EX5/55/ B34 & B EX5/ B34 & B EX5/ B50 & B FLAT FLANGE TYPE CODE CAPACITY ml FLANGE & JOINTS CATALOGUE # EX5/ & B DA5/75 Lid EX5/ & B DA5/100 Lid

51 extractors - thimbles In soxhlet extractors in liquid/solid extraction processes Cellulose fibre Pack size: 25 CAPACITY ml THIMBLE SIZE mm CATALOGUE # 6 10 x x x x x x X X 290 eye-wash station Emergency first aid Backboard - green polystyrene Bottle - polyethylene Backboard: Wall mountable with recess to hold an eyewash bottle. Directions are clearly printed on the backboard Bottle: Eye cup with snap on cap. Head with an air vent valve. Perforated spray plate. Drain tube Operation: The bottle is ergonomically designed to allow quick and immediate flushing to remove foreign matter and prevent serious eye damage. It can be filled with distilled water or any certified eyewash solution. The air vent in the head assures air refill of free space in the bottle thus preventing draw back of contaminated wash into the bottle. The perforated spray plate in the cup centre breaks up the stream to give the eye a gentle wash. A drain tube releases waste ITEM CATALOGUE # Station 1K2386 Bottle 1K383 fermentation tubes Fermentation processes CATALOGUE # 2 bulbs bulbs

52 filter crucibles - glass Alternate names: Operation: Gooch crucible Applications in quantitative analysis. Precipitates that have to be dried to the constant weight Flame polished rim Sintered disc with porosity of choice After cleaning, the filter crucible quickly reaches constant weight at 110ºC, as the remaining water evaporates. After the filtration it is placed with the moist precipitate in the hot drying cabinet at up to 150ºC where it is dried to the constant weight. Depending on the method of determination, it can be cooled by exposure to air or in a desiccator. To calcine a precipitate the crucible is placed in a cold oven and heated up to a maximum of 500ºC. After heating has been switched off it is allowed to cool down to about 200ºC in the oven Adapter Gloves Tongs Rubber sealing sleeve Hot grips CAPACITY ml POROSITY DIAMETER mm DISC DIAMETER mm CATALOGUE # 10 P P P P P P P P P P P P P P P P P P P P P P P P P ADAPTERS FOR CRUCIBLE ml CATALOGUE #

53 filter crucibles - ceramic Alternate names: Gooch crucible Applications in quantitative analysis. Precipitates that have to be dried to the constant weight Porcelain Perforated base Tongs Lid with finger grip Gloves Hot grips CAPACITY ml DIAM. x HEIGHT mm CATALOGUE # X A X A X A X R X R2a X R3 LIDS FOR CRUCIBLE DIAM. mm CATALOGUE # 82R3, D7 82A1, 82A D7a 82A D6 SLEEVES SIZE mm TO FIT CRUCIBLE ml CATALOGUE # filter apparatus Alternate names: Filter head. Screw filter Filtration through sintered media or filter paper Reservoir head with screwthread and white enamel graduations Screw-on funnel Two ring seals Slit sieve CAPACITY ml CATALOGUE # Filter disc with fused rim FILTECH filter paper Operation: To use filter paper circles insert the slit sieve into the screw-thread and place the filter paper circle on top of it, between the two ring seals ACCESSORIES POROSITY CATALOGUE # Filter disc P P P P Slit sieve

54 filter funnels - conical Quantative analysis, preparative chemistry and sterile filtration Conical funnel Flame polished rim Sintered disc Drip tip stem Length of stem Ground cone on the stem Guko DIAM. & STEM mm POROSITY DISC DIAMETER mm CATALOGUE # 55 P P P P P P P P P P P P P P P P P P P P P P P P P

55 filter funnels - cylindrical JACKETED Specific usage: Quantative analysis, preparative chemistry and sterile filtration Guko Cylindrical reservoir Flame polished rim Sintered disc Drip tip stem Integral water jacket on the jacketed funnel Standard 9mm tubing olives on the jacketed funnel Length of stem Ground cone on the stem Screwthread tubing olives Guko Screwthread tubing connectors Filtration of liquids where a constant temperature needs to be maintained Operation: A temperature controlling medium is circulated through the integral jacket JACKETED CAPACITY ml DIAMETER mm POROSITY CATALOGUE # CATALOGUE # P P P P P P P P P P P P P P P P P P P P P P P P P

56 filter tubes Filtration apparatus assemblies for specialised filtration techniques Sintered disc or candle Flame polished rim Drip tip stem Standard 9mm tubing olives Screwthread tubing olives ALLIHN CAPACITY ml POROSITY CATALOGUE # 30 P P P P P P P P P P MICRO FILTER TUBE Specific usage: Reactions between gasses and liquids DIAM. x LENGTH mm POROSITY CATALOGUE # 8 x 200 P x 200 P x 200 P x 200 P x 200 P IMMERSION FILTER STICK Specific usage: Operation: Reverse filtration by connection to a vacuum supply to draw off supernatant liquid from a precipitate When the purpose of suction filtration is to recover large quantities of clear filtrate and not the solids content, reverse filtration is used. The precipitate is allowed to settle and the above it is drawn off through an immersion filter. As there is little tendency for filter cakes to form on the filter disc, high filtration speeds can be achieved DIAM. x LENGTH mm POROSITY CATALOGUE # 8 x 210 P x 210 P x 210 P x 210 P x 210 P x 100 P x 100 P x 100 P x 100 P x 100 P

57 filter tubes - pipe-line Specific usage: Connection to flexible pipe-lines for liquid and gas filtration. Pressure or suction filtration of pharmaceutical solutions Sintered disc Standard 9mm tubing olives Screwthread tubing olives FILTER DIAM. mm POROSITY CATALOGUE # 30 P P P P P P P P P P flat flange flasks When extra wide necks are required in apparatus assemblies Round bottom Wide neck Flat ground flange Alternate flange size Amberise Lid See REACTION VESSELS CAPACITY ml FLANGE BORE mm CATALOGUE # florentine flasks Alternate names: Evaporating flask. Rotary flask Rotary evaporators Ground neck socket Alternate ground neck socket size Amberise Retaining hooks and springs CAPACITY ml SOCKET mm CATALOGUE # 100 B B B B B

58 forceps Alternate names: Tweezers Holding small, delicate or sterile articles White PMP (sharp end) Yellow POM (blunt end) Length 115mm SHARP END BLUNT END CATALOGUE # CATALOGUE # K500 Stainless steel SHARP END BLUNT END Length 125mm CATALOGUE # CATALOGUE # fractionating columns DUFTON Specific usage: Operation: Fractionating assemblies Alternate ground cone and socket sizes Coolant jacket Retaining hooks and springs Keck retaining clips Gas analysis Ground cone and socket Inner rod Fitted glass spiral that can be removed for cleaning. Drip tip Liquid spirals down the column and meets the ascending vapour CODE SOCKET & CONE mm JACKET LENGTH mm CATALOGUE # FC1/12 B FC1/22 B FC2/13 B FC2/23 B

59 fractionating columns HEMPEL Operation: Ground cone and socket Packing support Raschig rings, Fenske helices or glass beads Liquid cascades down the packing and meets the ascending vapour CODE SOCKET & CONE mm JACKET LENGTH mm CATALOGUE # FC7/23 B FC7/43 B FC7/44 B FC7/53 B FC8/23 B34 & B FC8/43 B34 & B PACKING CODE SIZE mm CATALOGUE # Raschig rings FC8/ Raschig rings FC8/ Fenske helices FC8/4S Spiral support EX PEAR/BULB Operation: Ground cone and socket Set of bulbs and pears which can be removed for cleaning Drip tip The bulbs are inserted into the column with the narrower diameter downwards. They are each separated by a glass pear (bubble). A liquid seal is formed between them and the column wall. Ascending vapour causes oscillation of the pears and resultant efficient mixing of liquid and vapour. The castellations allow excess liquid to flow down from bulb to bulb thereby reducing back-pressure and hold-ups CODE SOCKET & CONE mm JACKET LENGTH mm CATALOGUE # FC6/23A B34 & B PACKING SNYDER Operation: Ground cone and socket Fitted glass spikes and plugs CODE CATALOGUE # Bulb FC6/ Pear FC6/ Liquid cascades down the column and meets the ascending vapour which pushes the plugs upwards out of their sockets thus increasing the vapour-liquid contact and preventing flooding CODE SOCKET & CONE mm JACKET LENGTH mm CATALOGUE # QD / VIGREUX Operation: Ground cone and socket Combination of horizontal and angled spikes Drip tip The horizontal spikes cause good vapour-liquid contact and the angled spikes redistribute liquid from the column walls to the centre of the column CODE SOCKET & CONE mm JACKET LENGTH mm CATALOGUE # FC3/13 B FC3/23 B FC3/14 B

60 fractionating head Operation: Division of liquid in a fractional distillation process Integral jacketed spiral condenser Ground cones Standard 9mm tubing olives Screwcap for thermometer Spindle valve Side arm for venting or connection to a vacuum supply Alternate ground cone sizes Screwthread tubing connections Retaining hooks and springs Thermometer Keck retaining clips Fits on top of a fractionating column. Liquid leaving the integral condenser is directed towards the spindle valve, adjustment of which controls the proportion of liquid returned to the column or that is collected CODE CATALOGUE # SH30/ fractionating reflux divider To control the proportion of collected or returned liquid in a fractionating distillation assembly Sluice head Spindle valve Ball and cup joint Distillate head adapter Sockets and drip tip cones Retaining spring clip Retaining hooks and springs Condenser CATALOGUE # Keck retaining clips Operation: Insert the sluice head into the fractionating column and the distillate adapter into the socket of a condenser. Close the spindle valve to allow all liquid to return into the column. Open the spindle valve progressively to allow a greater proportion of liquid to be directed to a receiver It is recommended that a condenser be fitted to the outlet cone of the sluice head as the liquid leaving the distillate head could be close to boiling point freezing point determination set Components: Determination of freezing point of a liquid 800ml beaker Two test tubes one of which fits into the other Lid with thermometer hole and centre hole Two rubber stoppers Agitator Two thermometers CATALOGUE # ZGA

61 funnels - glass Facilitatory filling of vessels and qualitative and quantitative filtration Conical º All, except short stem and powder, are ribbed for rapid filtration and prevention of sealing FILTECH filter paper circles Stand Addition of a ground cone to the stem ANALYTICAL LONG STEM POWDER RIBBED, FLUTED SHORT STEM RIM DIAM. mm CATALOGUE # CATALOGUE # CATALOGUE # CATALOGUE # CATALOGUE # Soda-lime glass Not recommended for hot liquids LONG STEM SHORT STEM RIM DIAM. mm CATALOGUE # CATALOGUE # THISTLE Specific usage: Containment of splashing Soda-lime glass RIM DIAM. mm CATALOGUE #

62 funnels - plastic Facilitatory filling of vessels and qualitative and quantitative filtration Polypropylene and HDPE. The Urbanti funnel is PMP (TPX) Conical º All, except powder, are ribbed for rapid filtration and prevention of sealing The Urbanti has internal spiral ribs for rapid filtration FILTER PAPER CHART Funnel diameter Filter paper to use Funnel diameter Filter paper to use 50mm 5.5 & 7cm 100 & 110mm 15 & 12.5cm 55-65mm 7 & 9cm 120mm 18.5 & 24cm 70 & 80mm 11 & 12.5cm 150mm 24 & 27cm POLYPROPYLENE PMP (TPX) HDPE LONG STEM SHORT STEM POWDER URBANTI GENERAL PURPOSE RIM DIAM. mm CATALOGUE # CATALOGUE # CATALOGUE # CATALOGUE # 60 1K162 1K K164 1K150 1K167 1K K K K165 1K153 1K169 1K K K155 1K K156 1K166 1K K K K178 FUNNEL HOLDER Polypropylene Supports two funnels Rod screw lock Retort stand CATALOGUE # gas collection tube Collecting and weighing generated gasses Stopcocks with glass keys each end Standard 9mm tubing olive Alternate screwthread tubing connectors Alternate double oblique bore stopcocks PTFE stopcock keys Screwthread tube for septum CODE CAPACITY ml CATALOGUE # GRF ml

63 gas jars Collecting generated gasses Soda-lime glass Cylinder with lipped rim Flat ground flange Cover SIZE mm CATALOGUE # 150 x Beehive shelf 200 x Operation: The bee hive shelf is usually placed in a trough of water. A bent glass tube from the gas generating apparatus is led under the shelf through the arch. A gas jar is filled with water and placed upside down over the hole in the bee hive shelf. The gas bubbles upwards from the tube, displacing water which is forced down through the hole. When the cylinder is full the cover is slid between the jar and the shelf thus sealing in the gas. gas washing bottles Wash or dry gases of unwanted constituents ARNOLD ABSORPTION BULB Inner bulbs Straight tubing connectors CODE CAPACITY ml CATALOGUE # ARF DRECHSEL Ground neck socket Solid base CODE CAPACITY ml CATALOGUE # MF29/3/ MF29/3/ MF29/3/ WASHING HEADS Ground cone Sintered candle distributor Straight tubing connection pipe Dip tube - fixed or adjustable CODE CATALOGUE # Dreschel, plain dip tube MF Dreschel, sintered candle distributor MF Dreschel, adjustable dip tube MF Dreschel, adjsable dip tube and distributor

64 gas washing bottles Wash or dry gases of unwanted constituents MIDVALE ABSORPTION BOTTLE (BULB) Bulbous base Outlet tube in ground neck socket Hollow glass stopper with hole to match outlet tube Operation: Outlet tube is in the socket allowing flow-closure by a turn of the stopper CODE CATALOGUE # ARF SCHOTT Wash head Distribution tube GL45 screwcap Screwthread tubing connectors White enamel graduations Sintered candle of choice on distribution tube CAPACITY ml CATALOGUE # WASH HEAD gloves - disposable Latex and nitrile rubber Available in small, medium and large. Latex available in powdered and powder-free Pack size: 100 LATEX NITRILE POWDERED POWDER-FREE SIZE CATALOGUE # CATALOGUE # CATALOGUE # Small Medium Large

65 gloves & hand protectors "CLAVIES" Handling hot and biohazard items, hot objects out of the autoclave or oven and where other heat protection is needed Replace hazardous asbestos gloves Soft, pliant, all-cotton terry cloth Heat resistant up to 232ºC Machine wash, tumble dry Gauntlets in two lengths provide wrist and forearm protection The bright orange colour gives high visibility GAUNTLET LENGTH mm CATALOGUE # HOT GRIPS Silicone rubber. Application range from -57 º C to +250 º C Multi-studded surfaces CATALOGUE # 1K3915 hirschson flasks Alternate names: Phenol flask Determination of phenols in oils White enamel graduations Beaded rim Long neck Addition of ground socket Rubber bung CAPACITY ml CATALOGUE #

66 hydrometers Alternate names: Operation: Density meter. Aerometer Establishing the density of a liquid or preparation of an identified liquid based on Archimedes's Principle Allow the hydrometer to float freely and determine the reading at the surface level of the liquid RANGE CATALOGUE # 0.8 to 0.9 H to 1.0 H to 1.1 H to 1.2 H to 1.3 H to 1.4 H to 1.5 H to 1.6 H to 1.7 H to 1.8 H to 1.9 H to 2.0 H1920 incinerating dishes Incineration of samples for analysis. The deep form is primarily used for incinerating flour Porcelain Glazed inside and outside Spout on the deep form CAPACITY ml SIZE mm CATALOGUE # CYLINDRICAL x x x DEEP FLAT 5 37 x 10 33D x 11 33D x 12 33D4 RECTANGULAR x 25 33C x 40 33C00b x 45 33C4b x 23 33C7 617

67 inlet tubes Introduction of air, steam or gas into reactions. Ground cone CODE TYPE CONE mm CATALOGUE # MF15/0 Straight - 100mm B MF15/1 Straight - 100mm B MF15/2 Straight - 150mm B MF15/3 Straight - 150mm B MF15/4 Straight - 150mm B iodine flasks Storage of iodine and other halogenous substances Ground neck socket White enamel graduations Neck collar Amberise CAPACITY ml NECK mm CATALOGUE # 100 B B B B STOPPER Ground cone SIZE mm CATALOGUE # Hollow pointed B Long shank B jack Supporting and elevating laboratory bench equipment Polycarbonate Steam autoclavable at 121 C Large height adjusting knob to set heights from 76mm to 30cm Supports lab items up to 6.8 Kg. Electrically non-conductive Top plate diameter of 21cm Can be permanently mounted to the laboratory bench Do not lift weight from the bottom position. Place weight after raising to the desired position CATALOGUE # Jack Support rod

68 jars Specimen storage HDPE Screwcap CAPACITY ml PACK SIZE CATALOGUE # Polypropylene Screwcap Write-on section CAPACITY ml CATALOGUE # 150 1K5640 kipp's apparatus Gas generation Soda-lime glass Reaction chamber Reservoir CAPACITY ml CATALOGUE # Glass key stopcock Three-bulb fermentation tube

69 kjeldahl distillation unit Components: Kjeldahl distillations Kjeldahl flask Delivery adapter Liebig condenser Dropping funnel Splash head Two-neck multiple adapter CATALOGUE # ZGA Regulate the heating source carefully Use the least necessary concentration of potassium sulphate Avoid excess of sodium hydroxide (caustic soda) Avoid distilling to a low liquid level kjeldahl flasks Kjeldahl distillations Long neck Beaded rim Round bottom Addition of ground socket Amberise CAPACITY ml NECK DIAMETER mm CATALOGUE # kohlrausch flasks Determination of viscosity of liquids Widened neck above the volume level Mark at volume level Beaded rim Flat bottom CAPACITY ml CATALOGUE #

70 labeling systems Laboratory labeling and marking LABEL TAPES Write-On TM Label Tape colours match the Chemical Industry's color-coding system, making chemical labeling immediately identifiable. Six tape colours correspond with recognized hazard colour codes to emphasize safety information written on the labels; use green for safety labels, blue for labels that indicate health hazards, red for alerts about flammability, yellow for warnings about chemical reactivity, orange to note biohazard issues and white to highlight specific hazards. Write-On TM Label tape adheres to any clean surface, including PTFE fluoropolymer resin coated materials, and peels off without leaving a sticky residue that could bond to the surface during autoclaving. The tape is custom manufactured from proprietary materials that resist moisture and most solvents. The tape remains in place and withstands broad temperature and environmental extremes; from steam autoclaving at 121ºC down to 73ºC, ensuring samples are always "labeled". Pencil, ballpoint pen or solvent ink marker remains legible under the most demanding laboratory conditions. CATALOGUE # Holds and releases tape cut to required length. Accommodates tape rolls up to 133mm wide and the 7.0cm core fits standard tape rolls up to 25mm wide. A writing platform accommodates both left and right handed users for labeling tape prior to dispensing. The epoxy coated steel platform has finger holes for releasing the tape with a cut off edge for one hand use. A weighted base with non skid pads prevent sliding or lifting. The base is 213mm long x 87mm wide x 95mm high with a 102 x 152mm platform DISPENSERS: SINGLE ROLL 30meter x WIDTH CATALOGUE # WHITE 13mm WHITE 19mm WHITE 25mm RED 13mm RED 19mm RED 25mm YELLOW 13mm YELLOW 19mm YELLOW 25mm GREEN 13mm GREEN 19mm GREEN 25mm BLUE 13mm BLUE 19mm BLUE 25mm ORANGE 13mm ORANGE 19mm ORANGE 25mm

71 labeling systems MULTI-ROLL The Write-On TM multi-roll tape dispenser makes labeling easy and fast. Multiple colours and widths of labeling tape are readily positioned on a platform tha provides a smooth surface for writing on each tape. When a tape is advanced and cut off on the serrated edge, a fresh length of label tape is positioned on the writing platform. A variety of labeling tape widths from 12-25mm can be mixed together on the spindle which can easily accommodate 5 or more narrow rolls 12-19mm or four wider rolls 25mm. The spindle can be removed from the unit for loading and unloading tape and can be adjusted to hold either 25 or 75mm core diameter rolls. Included with each dispenser are three plastic separating discs, which when placed between the rolls assure smooth, snag free dispensing for up to four rolls of tape. Moulded -in pen holder wells on the dispenser help to keep writing instrument handy. The dispenser can also be wall mounted vertically o horizontally with the platform, the mounted dispenser can be equipped with an optional U-shaped stainless steel foot accessory that presents the dispenser at a 45º angle off of the wall. CATALOGUE # Multi-roll dispenser Additional separator discs Wall mount bracket A highly popular, permanent labeling system that offers great flexibility and convenience for identifying containers, cabinets, drawers, books and lab equipment. This unique system incorporates a tape dispenser, color-coded labels and clear, waterproof, wear-resistant plastic tape which fully covers and protect the label. The durable tape dispenser (A) is molded of strong ABS plastic with a steel serrated cutting blade. The roll is held in place by a spring-loaded cover and features an aluminium roller. 206 x 117 x 60mm. An optional weighted base (B) prevents surface spillage. CATALOGUE # Dispenser Weighted base White labels: 12.5 x 38mm x x 76mm x x 76mm x Protective tape: 25mm x 30m mm x 30m mm x 30m INK COLOUR CATALOGUE # Belpen markers: pack of 3 Black Blue Manomark pens: Box of 12 Assorted* Box of 12 Black Tech pens: Black Black Waterproof ink that withstands autoclaving Red White Yellow Blue Green Orange

72 laboratory bottles Alternate names: Sample bottles. Schott bottles. Specimen bottles Storage of reagents Retrace code for batch traceability via the internet at Pouring ring White enamel graduations Blue GL45 screwcap except 50ml which has GL32 Addition of side arm Addition of stopcock Different colour pouring rings Different colour screwcaps Loosen caps before autoclaving CLEAR AMBER SQUARE CAPACITY ml CATALOGUE # CATALOGUE # CATALOGUE # POURING RINGS & SCREWCAPS Polypropylene except red which are ETFE POURING RINGS SCREWCAPS SIZE CATALOGUE # Blue GL Red GL White GL Blue GL Red GL White GL Green GL Yellow GL Grey GL

73 laboratory bottles - hplc Conformity: Operation: Feeding solvents (eluents) to HPLC machines and collection of waste from HPLC processes of culture media under pressure (e.g. fermenter). Can also be used in all self-contained systems entailing sterile transfer Bottle:. Cap: PTFE and polypropylene The bottle has a special geometry according to ISO 4796, and is pressure/vacuum resistant in a range from 1 to +1.5 bar. The pressure resistance has been safety tested as per EN 1596 and is TÜV-GS certified Retrace code for batch traceability via the internet at Blue GL45 screwcap with 4 ports for tubing 1.6mm or 3.2mm Pressure resistant bottle 4 seals for ports 4 seals for 1.6mm tubing 4 seals for 3.2mm tubing Blue enamel graduations Ready for immediate use The four ports make it possible to serve three stations at the same time from one container. At the same time, the fourth port can be used for sterile pressure equalization. Unused ports can be closed with the special seals Pressure equalisation set with 0.2µm membrane filter Tubing Cleaning brush CAPACITY ml CATALOGUE # laboratory bottles - wide neck Alternate names: Sample bottles. Schott bottles. Specimen bottles Storage of reagents Blue GL45 screwcap White enamel graduations Retrace code for batch traceability via the internet at retrace.html Loosen caps before WIDE NECK autoclaving CAPACITY ml CATALOGUE # CAP

74 magnetic stirrers Alternate names: ELECTRIC Magnetic mixer Variable speed to 1000 rpm 240 volts Maximum stirring capacity 1000ml ELECTRIC WITH HOT PLATE Variable speed - 0 to 1250 rpm 220 volts Heating temperature up to 500 º C WATER/AIR TURBINE STIRRER Polypropylene/ABS CATALOGUE # CATALOGUE # Operated by water or air pressure Can be used flat on the bench or clamped onto a retort stand Water pump Magnetic stirrer bars CATALOGUE # Tubing 1K

75 magnetic stirring bars Facilitates agitation of liquids in beakers, bottles or flasks MAGNETIC STIRRING BAR SELECTION & USE Matching the drive and stirring bar can dramatically improve results! Magnetic stirring and mixing is used in a number of common laboratory procedures. The importance of selecting the best stirring bar for each particular application is often overlooked. Varying the size, shape or length of the magnetic stirring bar will after the motion imparted to the solution. Thus, selection of the appropriate stirring bar for given application should be done with great care. Understanding the principles of magnetism is important. On the most basic level, we are aware that opposite poles attract. However, we must also understand the significance of the drive element, magnetic coupling, spin-out, vessel shape, viscosity and turbulence. The drive motor of a magnetic stirrer provides the rotation necessary to spin the drive magnet. The drive magnet is generally a bar or U-shaped alloy or a ceramic disk. The magnetic poles are typically about 50mm apart in bench top models. The poles can be up to 140mm apart in units large enough to mix 190litres of liquid solution. For optimum efficiency and magnetic coupling, the distance between the magnetic poles of the drive magnetic poles of the drive magnet and the length of the stirring bar should be equal. Therefore, the drive magnet dictates the longest possible stirring bar that can be used effectively. A small metal washer moved around the surface plate of the stirrer will naturally gravitate towards one of the poles of the drive magnet. A small magnetic stirring bar will provide similar results. Another important parameter in choosing a magnetic stirring bar is the vertical distance between the drive magnet and stirring bar. The material and thickness of the cover plate as well as that of the containing vessel can also influence stirring efficiency. Cover plates are made of paramagnetic materials such as ceramic or aluminum, which offer better coupling of the drive magnet and stirring bar. The magnetic energy is not impeded as it might be if the top were made of magnetic materials. The amount of magnetic energy that joins the two magnets (coupling) falls off as the distance between them increase. Stated mathematically, the coupling energy of force is inversely proportional to the square of the distance between them. It stands to reason that for the best magnetic coupling, the distance between the magnets should be minimized. Magnetic stirring bars are generally made of ALNICO (an alloy of aluminum, nickel, iron and cobalt) encapsulated in an FDA approved PTFE coating. This combination offers the best compromise of magnetic strength, usefulness and cost. The PTFE coating is only useful at temperatures up to 225 C. Other coatings or coverings such as glass tubing, polypropylene and polyethylene are also used. More exotic materials have not been found to be commercially viable. High energy materials, such as Samarium Cobalt and Neodymium Iron Boron, though having a much higher energy product (Bd x Hd) than ALNICO V, do not always work better as drive magnets. The geometry of the magnet, in the case of bar magnets, length/diameter (L/D), governs how effective the magnet will be. The aforementioned magnets have energy products of three to six tomes that of ALNICO V in geometry of 1 to 1. When used in a 4 to 1 configuration, their relative levels are nearly the same or less than the ALNICO V. Additionally, many of the exotic materials are extremely temperature sensitive and will demagnetize as the temperature increases. Once a magnetic stirring bar has been placed in a container with a solution, it should be positioned directly over the centre of the drive magnet. The stirring speed should be increased slowly, until the desired vortex pattern is achieved. Should the magnetic stirring bar lose its coupling with the drive magnet because of the speed of the drive magnet or the viscosity of the fluid, it is said t have spun-out. Improperly selected stirring bars are the frequent cause of spin-out, as well as a drive magnet speed that is too fast. Matching the drive and stirring magnet improves results dramatically. The selection of the shape of the magnetic stirring bar also influences the resulting vortex. 626

76 magnetic stirring bars Alternate names: Spin bars PTFE coated magnetic iron alloys POLYGON & OCTAGON The 3712 series are polygon shape The 3711 series are polygon shape with a centre pivot ring The 3709 series are octagon, coloured, with a centre pivot ring APPROXIMATE WITH PIVOT RING RED YELLOW BLUE SIZE mm CATALOGUE # CATALOGUE # CATALOGUE # CATALOGUE # CATALOGUE # 8 x x x x x x ELLIPTICAL (egg shaped) Provides its own pivot point Designed especially for round bottom flasks APPROXIMATE FOR ROUND SIZE mm BOTTOM FLASK CATALOGUE # 10 x 19 >250ml x ml x ml x ml KOMET CIRCULUS (dumbbell) Specific usage: Octagonal shape - 21x50mm High energetic samarium-cobalt magnet Generates strong turbulence Produces exceptional power No risk of demagnetization by external magnetic fields Improved efficiency "Problem" liquids Highly viscous mixtures Mixtures containing metal particles in suspension Containers with round or convex bottoms Fast mixing action High turbulence Greater stability Minimal drifting at high speeds CATALOGUE # WHITE RED YELLOW BLUE LENGTH mm CATALOGUE # CATALOGUE # CATALOGUE # CATALOGUE # 32 1B B

77 magnetic stirring bars SATURN (bulb) Specific usage: Operation: Where powders in a liquid impedes stirring action Large central bulb The large bulb at the bar's center lifts the stirring bar ends while spinning and thereby reduces the surface contact area to allow the bar to spin with decreased drag. LENGTH mm CATALOGUE # SPINRING Operation: Octagonal shape Removable stabilising ring The stabilising ring keeps the bar centered in the vessel. The action creates a deep vortex without splashing or chattering and resists spinout APPROXIMATE SIZE mm CATALOGUE # 8 x x x x SPINWEDGE Specific usage: SPINSTAR Specific usage: Operation: To plow up sediment for thorough dispersion of viscous solutions Sharply angled broad faces Strong mixing action APPROXIMATE SIZE mm CATALOGUE # 10 x x x x To fit exactly into beakers Fits exactly the inside diameter of the beaker Creates a deep vortex at relatively low speeds APPROXIMATE SIZE mm FOR BEAKER CATALOGUE # 10 x ml x ml x ml SPINPLUS Fast and efficient mixing Stable, quiet operation Operation: Creates a deep vortex APPROXIMATE SIZE mm CATALOGUE #

78 magnetic stirring bars SPINFIN Specific usage: SPINVANE Agitation of liquids in round bottom test tubes, and where other stirring bars cannot be used Fins on top and bottom for complete agitation Will not wobble APPROXIMATE SIZE mm CATALOGUE # 13 x x x CATALOGUE # Tapered Half round Triangular Triangular MAGNETIC PICK-UPS: RETRIEVER RETRIEVER FOLLOWER PE Powerful Alnico magnet Hang-up loop 305mm long CATALOGUE # 9.5mm diameter PE Long ribbed handle 200mm long CATALOGUE # 9.5 mm diameter This retriever is able to remove a magnetic stirring bar without coming into contact with the contents of the vessel. It eliminates contamination of contents and does not need to be cleaned or autoclaved after use. The retriever is held in contact with the vessel where the magnetic stirring bar rests. It is then moved upward with the stirring bar following inside the vessel to a point where it can be grasped 629

79 magnetic stirring bars FLEXIBLE RETRIEVER Specific usage: POSITIONER/RETRIEVER Specific usage: Operation: ARRESTER Specific usage: Operation: Retrieving magnetic stirring bars from containers or from non-magnetic sink drains and traps PTFE Flexible rod 330mm long Hanging loop Chemical resistant PE Position the stirring bar exactly where you want it without splashing. Remove bars without touching or pouring out contents of the vessel Hanging loop 305 mm long 16 mm diameter To pick up a stirring bar, hold the polyethylene retriever down; to release a stirring bar, slide the retriever up PE To hold a stirring bar in place whilst pouring from a beaker or flask Place the arrester against the bottom of the container WHITE RED BLUE YELLOW CATALOGUE # CATALOGUE # CATALOGUE # CATALOGUE # Flexible retriever Positioner/retriever Arrester magnifier Plastic the lens folds into the handle MAGNIFICATION DIAMETER. mm CATALOGUE # 3.4 x x

80 manifolds Distribution of, and control of, flow of vacuum in vacuum assemblies 25mm diameter manifold body Ground socket Stopcock of choice Standard 9mm tubing olive Horizontal or vertical outlets Screw thread tubing connector Addition of further ports TYPE LENGTH mm CATALOGUE # 2-port port markham distillation unit Specific usage: Operation: Nitrogen determination Evaporator vessel enclosed in a steam jacket Liebig condenser Screw thread tubing connectors Cutting off steam supply to the distillation causes the apparatus to automatically suck back in immediate preparation for the next determination CATALOGUE # ZGA m c cartney bottles Alternate names: Bijou bottles Storage of samples and specimens Neutral glass Flat bottom Screwcap with inner seal NARROW MOUTH WIDE MOUTH CAPACITY ml DIAM. x HEIGHT mm CATALOGUE # CATALOGUE # 7 05ZVN x 53 05ZVN x 84 05ZVN287 05ZVN

81 measuring cylinders Receive and accurately measure various quantities of liquids Class A volumetric vessel Spout Hexagonal base White enamel graduations Cleaning brush CONFORMITY CERTIFIED CAPACITY ml CATALOGUE # CATALOGUE # Plastic Spout Hexagonal base POLYPROPYLENE PMP (TPX)) CLASS A CLASS B CLASS B CAPACITY ml CATALOGUE # CATALOGUE # CATALOGUE # 10 1K2560 1K K2561 1K K2562 1K K2563 1K K2564 1K K2565 1K K2566 1K K2567 1K1577 measuring jugs Decanting of measured amounts of liquids Polypropylene Moulded graduations overprinted in blue CAPACITY ml CATALOGUE # 250 1K K K K K

82 medicine droppers Transferring liquids drop-by-drop Neutral glass Dropping pipette Rubber teat SIZE mm CATALOGUE # Screwcap 15 x melting point tube Determination of melting points of substances Neutral glass Lipped rim CATALOGUE # mercury collector Operation: Capture and contain spilled mercury beads To collect spilled mercury quickly, unscrew the lid with the foam pad the pad. When the lid is screwed back onto the jar, the pad is compressed against the jar s free-standing perforated plate, releasing the mercury into the jar bottom CATALOGUE # Collector 1B36250 Spare foam pad 1B

83 microscope glasses Mounting and covering of samples or specimens on microscope slides SIZE mm PACK SIZE CATALOGUE # COVER SLIPS 15 x CS x 18 05CS x 20 05CS x 22 05CS x 40 05CS x 50 05CS x 24 05CS x 40 05CS2440 SLIDES: Frosted 26 x MS7525 Plain 26 x 76 05MS7626 STORAGE SYSTEMS: ABS/PS BOX Accommodates 25, 50 and 100 slides CATALOGUE # Numbered slots 25 place 1K276 Fit into the unit draw 50 place 1K place 1K278 DISPENSER Operation: MAILER Accommodates 50 slides Dust cover Rotate the knurled knob on the side of the base. Rubber rollers ease out the slides which may then be handled on the edges CATALOGUE # 1K540 Polypropylene Can also be used as a 12ml specimen vial CATALOGUE # 1K922 TRAY Accommodates 100 slides Numbered slide cavity CATALOGUE # 1K921 Dust cover 1K920 UNIT Five draws Addition of more draws 420x420x725mm Removable top lid Additional draws Slide tray (10 per draw) for 100 slides Set of four castors CATALOGUE # Dust cover for slide support 1K

84 mixing cylinders Alternate names: Stoppered measuring cylinders Volumetric vessel for diluting solutions and accurately measuring and mixing several liquids in a given quantity ratio Class A Ground neck socket Plastic stopper Hexagonal base White enamel graduations Glass stopper Cleaning brush CONFORMITY SCHOTT CERTIFIED CAPACITY ml CATALOGUE # CATALOGUE # CATALOGUE # 10 B B B B B B B B moisture trap In distillation apparatus assemblies B24 ground neck socket and cone Glass key stopcock Alternate sizes ground neck socket and cone PTFE key stopcock CATALOGUE # moreton flasks Improved stirring caused by the indentations B24 ground neck socket Indentations for increased agitation Round bottom Stopper CAPACITY ml CATALOGUE # Cleaning brush

85 mortars & pestles Crushing and grinding solids Porcelain and melamine PORCELAIN MELAMINE CAPACITY ml DIAMETER mm CATALOGUE # CATALOGUE # multi-neck flasks Multi-function apparatus assemblies Ground neck socket Round bottom Choice of angled or parallel necks Alternate size ground neck sockets Flat bottom Stopper Cleaning brush 2 NECKS 3 NECKS CAPACITY ml CENTER NECK mm SIDE NECK/S mm CATALOGUE # CATALOGUE # 50 B14 B B19 B B24 B B19 B B24 B B19 B B29 B B29 B B19 B B24 B B24 B B29 B B29 B B24 B B24 B B29 B B29 B B24 B B24 B B29 B B29 B B34 B nessler cylinders Alternate names: RACK Comparison tubes Comparison of liquids to a standard. Soda-lime glass Matched pair Flat bottom Spout Ring marks at 50ml and 100ml Polypropylene Easy snap together assembly Lower deck has reflective surface CAPACITY ml DIAM. x HEIGHT mm CATALOGUE # x NT

86 nmr sample tubes Contain samples in NMR spectroscopy 5mm diameter Three qualities available, each meeting the highest requirements Every tube is subjected to a Laser Check System and is individually tested against its own particular specification Coloured caps QUALITY PACK SIZE CAMBER mm CATALOGUE # Economic Professional Scientific NMR guarantees reproducible spectra Various investigations have shown that the specifications of NMR tubes that have been available in the past were often not capable of ensuring a good quality of spectrum. A new range of NMR tubes has now been developed which caters for all the quality criteria for obtaining optimum spectra that were only conceivable before. What is so interesting about NMR tubes that it is worth writing about? Now all NMR users know how very much the quality of their spectra depend on the quality of the sample vessel they are using. There are initially two reasons for this: The sample tube is also measured as part of the measuring process. This means that its material and geometry properties should have preferably no influence on the measurement or at least an influence which can be eliminated by calculation. The sample vessel itself is in an inaccessible position in the measuring instrument during the measurement process, namely in the middle of the magnet. It should not be disturbed there under any circumstances since it is very difficult to interfere with it in this position. The material and dimensions of NMR tubes are subject, therefore, to very stringent requirements and they are accordingly expensive to manufacture. Before a new range of NMR sample tubes comes on the market, a large number of tests have to be carried out before the products agree with the specifications laid down. Then, when they are in full production, measures have to be implemented to ensure that the specifications laid down are adhered to. NMR quality criteria The decisive factor for the quality of a spectrum is how accurately the magnetic field is adjusted to the sample in the NMR tube. As this adjustment (or shimming) can be a complicated process, both the absolute geometry of the tube and the comparability of different tubes are a important quality criteria. For this reason, the adjustments between the different tubes, e.g. in the sample changer, should be as identical as possible. Shimming is then only required once and not for each tube. From this the various quality criteria for a good NMR tube can be derived: Identical sample quantities should come to the same level in several tubes in the sample changer. Otherwise the magnetic field must be readjusted. All tubes should have the same diameter as far as possible. The wall thickness should be the same at every point. The tube must be straight. All the tubes must sit firmly in the spinner without moving and must be a good fit. The tubes should be robust so that they cannot be damaged in the NMR unit. The glass should be chemically resistant and inert to all samples. The glass may not contain any paramagnetic impurities that can result in problems in the spectrum. The tubes must be labeled so that different qualities can be clearly distinguished. Nowadays, many samples are measured without rotating them as in former times. The reason here too can be found in the homogeneity of the magnetic field. If they are not rotated completely evenly the result is a worse spectrum. It is, therefore, better in many cases to compensate for any irregularities by shimming. However, it is even better to ensure that as few irregularities as possible occur with an accurately specified quality. Most NMR spectroscopy workers have got used to rolling NMR tubes on a flat surface as a rough test. This way of sorting out the bananas makes sense as a preliminary test in practice, but of course it is not adequate for production development and production control purposes. 637

87 parafilm Wrapping and sealing samples CATALOGUE # 08PM996 pasteur pipettes Taking up a small amount of liquid for transfer Neutral glass Rubber teat LENGTH mm CATALOGUE # Pack size: PP PP230 Polyethylene Pack size: 500 CAPACITY ml CATALOGUE # 1.5 1K K88337 Can be deep-frozen with contents. Tips can be heat-sealed to from a closed ampoule. Ideal for aliquots TEAT CAPACITY ml CATALOGUE # 3ml pear shape flasks Micro and semi-micro distillation assemblies Ground neck sockets B14 ground cone on side arm of series Alternate size ground joints SINGLE NECK WITH SIDE ARM DOUBLE NECK TRIPLE NECK CAPACITY ml SOCKET mm CATALOGUE # CATALOGUE # CATALOGUE # CATALOGUE # 50 B B B B B

88 petri dishes Biological and medical applications especially in microscopical studies Lid Neutral glass DIAM. x HEIGHT mm CATALOGUE # 60 x x Polystyrene Pack size: 500 pipette tips STERILE NON-STERILE DIAMETER mm CATALOGUE # CATALOGUE # Attaching to pipettors for dispensing Polypropylene Universal fitting for most popular brands of pipettors Pack size: 1000 CAPACITY ml COLOUR CATALOGUE # Yellow 1K Blue 1K

89 pipettes Accurate measurement and recharging of liquids Class AS Colour code rings Graduated, 0 at top Calibrated to deliver for a reference temperature of 20 º C Pipette filler Do not fill by mouth - use a suitable pipette filler Insertion of cotton wool will prolong evacuation time MEASURING, GRADUATED, TRANSFER Soda-lime glass CERTIFIED CAPACITY ml COLOUR-CODE CATALOGUE # CATALOGUE # x green x blue x yellow yellow black red orange x yellow white nil Polypropylene SINGLE USE STERILE CAPACITY ml COLOUR-CODE CATALOGUE # CATALOGUE # CATALOGUE # 1 yellow green blue orange red VOLUMETRIC, BULB CERTIFIED CAPACITY ml COLOUR-CODE CATALOGUE # CATALOGUE # x black blue orange white red yellow blue red yellow Polypropylene CAPACITY ml CATALOGUE #

90 pipettes - fillers PIPETTE BALLS (PRO-PIPETTE) - A Moulded 60ml rubber bulb with three glass ball valves that can be controlled by finger pressure. Suitable for use with all liquids except those that attack rubber PIPEO ELECTRONIC - B Pipette handling made simple and comfortable. Ergonomic light weight handle and excellent balance contribute to operating ease. Freely and precisely adjust the speed of liquid discharge with one hand, using the two easily accessible buttons. A 50ml pipette can be filled quietly and with minimum vibration in less than 10 sec Can be set to release liquid either in gravity delivery or blow-out mode using the rechargeable battery-operated motor. A LED lamp changes from green to red approx. two hours before recharge is necessary and the Pipeo can still be used during recharging. Handles pipettes up to 100ml MANEUS - C Allow other left and right handed operation easily, tirelessly and safely with all common pipettes from 0.1ml to 100ml. Easy handling with high sensitivity lets even inexperienced users to set the meniscus precisely. Easy to dismantle, very simple to clean and completely autoclavable PIPETTE PUMPS (PI-PUMP) - D Suction and dispensing is achieved by rotating the thumb wheel. A pressure lever ensures all liquid is evacuated. Available in three different volumes, each colour coded for easy identification. Made of polypropylene. PLUNGER - E Comfortable grip. Press the plunger and release to fill pipette. The knurled cap adjusts the plunger stroke for repeating preset volume. A rubber chuck holds pipettes securely and safely. Handles pipettes up to 10ml. Graduations on the body VADOSA - F Safety pipetting device, easy to use, delivering the smallest quantities with precision and speed. It can draw up and measure any liquid, even the most viscous ones Fits every type and size of pipette from 0.1ml to 25ml. Simple one handed operation with no hand squeezing, sucking or guessing. Made of polypropylene ECONOMY PIPETTE PUMPS - G The ergonomic design enhances comfort, utility and precision dispensing while reducing repetitive and awkward pipetting motions. This lightweight device provides accurate, trouble free pipetting with simple, one-handed operation. The optimally located thumb wheel rotates easily for precision aspirating or dispensing, down to a volume of one drop at a time all while using a more relaxed grip. The thumb wheel also can be used to "blow out" the pipette. Available in three different pipette volumes, each colour coded for easy identification. It resists acids, alkalis and most solvents and can be easily disassembled for cleaning. Over all length 171 mm A CAPACITY ml CATALOGUE # Standard Universal B CATALOGUE # E CATALOGUE # 1K198 C F CATALOGUE # CAPACITY ml CATALOGUE # >25 1K199 D G CAPACITY ml CATALOGUE # CAPACITY ml CATALOGUE #

91 pipettes - holders RACKS DRAW TRAYS CONFIGURATION CATALOGUE # PLASTIC 94 Rotary 1K261 Box 1K255 WOOD 12 Horizontal Vertical Vertical L x W x H mm CATALOGUE # PVC 420 x 300 x 30 1K x 215 x 40 1K996 pressure equalising funnels Operation: Addition of measured amounts of liquid at a set rate under vacuum. Solvent trap to facilitate recovery at the end of a soxhlet extraction Pressure equalisation side tube Ground cone and socket Glass-key stopcock Plastic stopper Alternate size ground cone and socket PTFE-key stopcock Spindle valve The side tube allows equalisation of pressure between the funnel and vessel Cleaning brush GLASS KEY PTFE KEY CAPACITY NECK CATALOGUE # CATALOGUE # 50ml B G T 100ml B G T 250ml B G T 500ml B G T 1000ml B G T 2000ml B G T 642

92 pumps WATER-JET VACUUM Evacuation of vessels such as Buchner flasks. Can also be used to vacuum up spilled chemicals Polypropylene HAND Break-apart for easy cleaning Integral non-return valve to prevent back-streaming Evacuation of 5 litres in 20 minutes Withstands pressure up to 10 bar High impact polystyrene Pressure gauge Pumping rate is 15 ml per stroke Attains a vacuum of 625 mm Hg (25") Built in vacuum release valve Nozzle fits standard 6 mm (1/4") i.d. tubing CATALOGUE # 1K1395 Can be used as pressure pump by transferring release valve cap to vacuum port CATALOGUE # 1K1398 pycnometers Alternate names: GAY-LUSSAC Density bottle. Specific gravity bottle Ground neck socket Matched ground-in glass capillary stopper Conforms to DIN TEMPERATURE MONITORED Ground neck socket Adjusted and calibrated Side capillary tube with cap Conforms to DIN Temperature range 100 º C-350 º C Ground-in thermometer TEMPERATURE GAY-LUSSAC MONITORED CAPACITY ml CATALOGUE # CATALOGUE #

93 reaction vessels Reactions in apparatus assemblies Ground flat flange vessel Flange retaining clip Lid to order - sockets and sizes Addition of jacket with inlet and outlet tubing connections to order Silicone grease Cleaning brush CAPACITY ml CATALOGUE # Flat flange reaction vessels may be used to operating wall temperatures up to 250ºC but the temperature difference in the glass should not exceed 300ºC Vessels and lids available separately FLAT FLANGE LIDS QUICK RELEASE CLAMP SOCKETS CATALOGUE # When ordering please state the number of sockets required and their sizes SIZE mm CATALOGUE #

94 reagent bottles Storage of reagents, etc. Soda-lime glass Ground neck socket Glass stopper Cleaning brush NARROW NECK CLEAR AMBER CAPACITY ml NECK mm CATALOGUE # CATALOGUE # 30 B B B B B B B B B WIDE NECK CLEAR AMBER CAPACITY ml NECK mm CATALOGUE # CATALOGUE # 30 B B B B B B B Polypropylene Neck socket Plastic stopper Cleaning brush NARROW NECK WIDE NECK CAPACITY ml NECK mm CATALOGUE # NECK mm CATALOGUE # 100 B B B B B B B B B B

95 receiver tubes Small scale filtrations Round bottom Side arm with standard 9mm tubing olive Beaded rim Ground socket Screwthread and cap Screw thread tubing connector on side arm retort rings SIZE mm CATALOGUE # 16 x x x x x Supporting funnels etc. on laboratory scaffold or retort stand Galvanised steel Bosshead Retort stand SIZE mm CATALOGUE # 80mm mm scalpel Dissecting Stainless steel CATALOGUE # Blades (N0. 23) KENSB23 scissors Dissecting Stainless steel 125mm CATALOGUE #

96 scoops & spoons Scooping of powder for sampling and transfer from wide mouth containers Polyethylene Stand flat CAPACITY ml LENGTH mm CATALOGUE # STERILE Polystyrene Individually sterilized and sealed in a polyethylene bag Issued with individual certificates of sterilisation and production number for accurate traceability The 3692 series has a specially designed detachable lid thus eliminating the need for a sampling bag Remain upright when filled or empty To use the 3692 series simply remove the scoop from the bag and detach the lid using the convenient tab. After taking the sample replace the snap-on lid and use the scoop as a container for transport Can be used as weighing boats WHITE RED WITH LID CAPACITY ml LENGTH mm CATALOGUE # CATALOGUE # CATALOGUE # scribe pen Inscribing on glass, ceramics and plastic Retractable tungsten carbide tip Pocket clip CATALOGUE # 1B

97 seals In screw caps. Suba seal for bottles and tubes. The seals can also be used as septums for piercing Silicone rubber CAP THREAD SIZE SIZE mm CATALOGUE # HOLE DIAM. mm CATALOGUE # GL GL GL GL GL SUBA SEAL Operation: Natural rubber Ringed section for complete sealing Flap section Insert the ringed part into the bottle neck or tube and bend the flap down over the bottle neck or tube SIZE mm CATALOGUE # sedimentation cone Alternate names: Imhoff cone Sewage analysis Styrene-acrylonitrile Moulded graduations Screwcap at tip CAPACITY ml HEIGHT mm CATALOGUE # STAND 1K

98 separating cylinder Order requirements: Oil separation Ground socket Round base Stopcock 250ml capacity Ground socket size Stopcock type CATALOGUE # separating funnels - glass Draining of separated layers of liquids in a mixture from heaviest to lightest Ground neck socket Stopcock Plastic stopper Drip tip outlet Spindle valve Alternate size socket Amberise Ground cone outlet Side arm Glass stopper Cleaning brush Stand PEAR SHAPE SQUIBB PATTERN GLASS KEY PTFE KEY GLASS KEY PTFE KEY CAPACITY ml SOCKET mm CATALOGUE # CATALOGUE # CATALOGUE # CATALOGUE # 50 B G T B G T B G T B G T B G T B G T CATALOGUE # ROTARY STAND for 10 x 100,250ml funnels ROTARY STAND for 6 x 500,1000ml funnels ADJUSTABLE RACK

99 separating funnels - plastic Draining of separated layers of liquids in a mixture from heaviest to lightest Polypropylene and PMP(TPX)) Neck socket Stopper Stopcock 1K978 can be dismantled for easy cleaning CAPACITY ml SOCKET mm CATALOGUE # PP 125 B PP 250 B PMP 500 B29 1K978 spatulas Transferring small amounts of powders Stainless steel SIZE mm CATALOGUE # Chattaway, double Chattaway, micro Chattaway, single Nuffield Nuffield HK Spoon/flat MICRO WEIGHING SET Contents: Forceps Two double spatulas Four spoon/spatulas Pouch Each piece 150mm long CATALOGUE # 1B36705 VIBRATING SPATULA PLASTIC Toothed thumb wheel causes vibration when moved Brown FEP coated tip to reduce sticking losses Polyamide with fibre-glass filling LENGTH mm CATALOGUE # DOUBLE 150 1K594 SPOON/FLAT 180 1K596 STIRRING SPATULA, POLICEMAN Polypropylene Flattened ends. Length 245mm CATALOGUE #

100 splash heads Operation: To prevent carry-over of liquid splashes in distillations. Introduction of steam into flasks Standard 9mm tubing olives Ground sockets and/or cones Alternate socket and/or cone Drip tip Length of arm Screwthread tubing connector Fits between a flask and a condenser CODE JOINTS mm CATALOGUE # VERTICAL SH17/23 B19/B SLOPING SH7/02 B SH7/43 B SH7/0/44 B LONG ARM SH7/12 B SH7/13 B24/B SH7/53 B VACUUM B24/B SH7/23/SC B24/B SH7/25/SC B34/B spreader Spreading powders or gels over a surface Coat hanger shape 5 x 205 x 58mm CATALOGUE # Flame polished ends springs Holding joints with hooks on glassware. Supplied in pairs Stretch Looped ends SIZE mm CATALOGUE # LS

101 staining jars & trays Holding microscope slides for staining Soda-lime glass Tray - boro-silicate glass SIZE mm CATALOGUE # COPLIN 45 x HELLENDAHL 90 x 40 x x 60 x SCHIEFFERDECKER 90 x 70 x STAINING TRAY + HANDLE 88 x 40 x STORAGE BOX 108 x 90 x PMP(TPX)) SIZE mm CATALOGUE # 81 x 101 x 70 1K353 RACK (polypropylene) 1K354 HELLENDAHL 58 x 53.5 x 86 1K355 SCHIEFFERDECKER 85 x 70 x 50 1K x 92 1K1100 STORAGE BOX 1K1101 stands Supporting of apparatus The tripod stand is powder coated steel with a triangular top The quadruped stand is made of chrome nickel and the top is recessed to receive a Ceran plate The retort stand base is powder coated cast iron with a threaded hole to receive a stainless steel threaded rod The electrode holder has a flexible arm with molded acetyl copolymer links and ball-and-socket joints. One end has a 12.7mm diameter stainless steel pin for attachment to a clamp or base. The base has 13mm rod-holding wells with thumbscrews at the centre of each edge SIZE mm CATALOGUE # TRIPOD QUADRUPED RETORT STAND FLEXIBLE ELECTRODE HOLDER 23x FLEXIBLE ARM & BASE

102 still heads Alternate names: Distillation heads Connecting flasks to condensers in distillation assemblies Ground sockets and/or cones The extra sockets on the and series allow the acceptance of dropping funnels, stirrers and thermometers etc. Alternate size socket and/or cone Screw thread inlet for thermometer Retaining hooks and springs Thermometer adapter Screwcap for thermometer Thermometer CODE CONES mm CATALOGUE # RECOVERY SH1/11 B SH1/22 B SH1/23 B24 & B SH1/33 B B29 & B SH1/44 B VERTICAL RECOVERY SH2/11 B SH2/22 B SH2/23 B24 & B SH2/33 B B14 SOCKET INLET SH4/1 B SH4/22 B SH4/23 B24 & B SH4/33 B SH4/24 B29 & B SH4/44 B CLAISEN, SH6/1 B B14 SOCKETS SH6/22 B SH6/23 B24 & B SH6/33 B SH6/44 29/ VIGREAUX, QD-3050 B B14 SOCKETS B B24 & B B B CLAISEN-VIGREAUX, QD-3040 B B14 SOCKETS B B B B

103 stirring rods Agitating and stirring of liquids Flame polished ends Rubber policeman on SR1805RT SIZE mm CATALOGUE # 3 x 150 SR x 150 SR x 200 SR x 150 SR x 180 SR1805RT 5 x 200 SR x 300 SR x 150 SR x 300 SR x 450 SR x 100 SR x 150 SR x 200 SR x 250 SR x 300 SR x 300 SR x 400 SR X 500 SR50010 PVC with metal core SIZE mm CATALOGUE # 250 x stohlman flask Alternate names: Shaking flask Shaking apparatus. Ring mark at 500ml Beaded rim Long neck 24mm id Flat bottom Alternate capacity Ground neck socket Rubber bung CATALOGUE #

104 stopcocks Alternate names: Taps Releasing liquids from vessels and flow-closing or reduction in air and water lines in apparatus assemblies Glass barrel - ground for glass key, polished for PTFE key Keys of same size barrels are interchangeable Tubes can be bent to suit application CATALOGUE # SINGLE, GLASS KEY, 12.5/ SINGLE, GLASS KEY, 14.5/ SINGLE, GLASS KEY, 14.5/ SINGLE, GLASS KEY, 18.8/ SINGLE, PTFE KEY, 12.5/ SINGLE, PTFE KEY, 14.5/ SINGLE, PTFE KEY, 14.5/ SINGLE, PTFE KEY, 18.8/ HIGH VACUUM, GLASS KEY DOUBLE OBLIQUE, GLASS KEY, 14.5/ DOUBLE OBLIQUE, GLASS KEY, 18.8/ DOUBLE OBLIQUE, PTFE KEY, 14.5/ DOUBLE OBLIQUE, PTFE KEY, 18.8/ THREE WAY (T), GLASS KEY, 18.8/ THREE WAY (T), PTFE KEY, 18.8/ SPINDLE VALVE, GU, SPINDLE VALVE, GU, SPINDLE VALVE, VACUUM, stoppers - glass Solid: soda-lime glass Hollow: boro-silicate glass Ground cone SOLID CLEAR SOLID AMBER HOLLOW CLEAR SIZE mm CATALOGUE # CATALOGUE # CATALOGUE # B B B B B B B

105 stoppers - plastic Polypropylene Ridged shank Hexagonal grip top stoppers - rubber SIZE mm CATALOGUE # B B B B B B B B TUBING CONNECTORS B29 1K1816 Alternate names: Sizes: Bungs Natural rubber except the *grey which are silicone rubber The diameter of the bottom of the bung is given first followed by the top measurement and then the length SIZE mm CATALOGUE # 5x7x16 08SRR x10x20 08SRR x10x20 08SRR x13x20 08SRR x13x20* 08SRG x13x20 08SRR x14x25 08SRR x16x25 08SRR x18x25 08SRR x21x25* 08SRG x21x25 08SRR x23x28 08SRR x25x x26x28 08SRR x28x26 08SRR X26x28 1K x36x35 08SRR x37x35 08SRR x37x37 1K x42x42 08SRR x48x50 1K x65x70 1K

106 storage bottles - plastic Storage of laboratory reagents Polyethylene Screwcap WIDE MOUTH WIDE MOUTH NARROW MOUTH ROUND ROUND SQUARE SQUARE NATURAL GRADUATED GRADUATED GRADUATED CAPACITY ml CATALOGUE # CATALOGUE # CATALOGUE # 25 1K WM50 1K K K K WM250 1K K WM500 1K K WM1000 1K K WM WM2000 1K413 1K614 sugar flasks Analysis of sugar solutions in a dilution of 1 in 10 Beaded rim Long neck Flat bottom Ring marks at volume level and 10% more for correct dilution Addition of ground socket Rubber bung Cleaning brush CAPACITY ml CATALOGUE #

107 swabs Cleaning and sample taking Plastic stick with cotton bud tip Stick attached to closure for transport swab Tube for transport swab PACK SIZE CATALOGUE # PLAIN 100 F155K TRANSPORT 50 F165C syringes Injection or extraction through a septum Plastic SIZE mm CATALOGUE # Pack size: 100 2/ Needles NEEDLES 18g tablet tubes Alternate names: Pill or polytop vials Push in plastic stoppers for glass tubes Hinged caps on plastic tubes APPROXIMATE DIAM. x LENGTH GLASS PLASTIC CAPACITY ml mm PACK SIZE CATALOGUE # CATALOGUE # 7 50 x T x & 1000 T x T x & 1000 T x T x & 1000 T x T

108 test sieves Separation of solids from water Stainless steel 200mm diameter Supplied with certificate Adapter Receiver Lid Separating pan Wet wash receiver MESH SIZE CATALOGUE # MICRON MESH & to MILLIMETER MESH 1 to to ADAPTER 7201 RECEIVER 7202 LID 7203 SEPARATING PAN 7204 WET WASH RECEIVER 7205 MICRO SIEVE SET Contents: Spares: Operation: Polypropylene Phosphor-bronze mesh inserts Four interchangeable screen holding sections Catch pan Cover Four screen retaining rings Eight phosphor-bronze mesh inserts, one each of eight sizes: 25, 35, 45, 60, 80, 120, 170 and 230 linear openings per inch mesh The holding sections are 55.9mm I.D. x 41mm high with a capacity of about 60ml The complete stack with basin and cover is 72.1mm maximum O.D. x 216mm high Pack of 8 mesh inserts The sections unscrew easily for changing mesh inserts or cleaning thoroughly, and screw together snugly to lock the mesh in place CATALOGUE # SIEVE

109 test tubes - glass Alternate names: Boiling tubes Simple experiments for qualitative chemical analyses. Rimmed test tubes should be used for frequent pouring or shaking Flame-polished rim Round bottom Pack sizes: Soda-lima & neutral glass in packs of 100 *pack of 80 in packs of 10 Rubber bung Plastic cap Cleaning brush Holder Soda-lime test tubes are not recommended for heating RIMLESS NEUTRAL SODA-LIME BORO-SILICATE APPROX. CAP. ml DIAM. X LENGTH mm CATALOGUE # CATALOGUE # CATALOGUE # 6 10 x 75 05TT1075N 05TT1075S 8 12 x 75 05TT1275N 05TT1275S x TT12100N x 88 05TT1588S x TT15100S x TT16100N x TT16125N x TT16150N x x TT18150N x TT20150N x TT24125N x TT24150N RIMMED NEUTRAL SODA-LIME BORO-SILICATE APPROX. CAP. ml DIAM. X LENGTH mm CATALOGUE # CATALOGUE # CATALOGUE # x TT15100SR x x TT16125NR x TT16150NR x x * 20 x TT20150NR * 24 x TT24150NR CAPS Polyurethane Pack size: 100 FOR TUBE SIZE mm CATALOGUE # 12 1K K K K K K K

110 test tubes - plastic, single use Polypropylene Coloured screw caps: 1K88 series - red, blue, yellow or white caps Conical bottoms on the 1K84 series Pack sizes: 1K84000 & 1K K84002 & 1K K K STERILE STERILE CAPACITY SIZE CATALOGUE # CATALOGUE # CATALOGUE # CATALOGUE # 15ml 16 x 100mm 1K K ml 17 X 120mm 1K K ml 30 X 115mm 1K K84003 RACKS CAPACITY & SIZE CATALOGUE # POLYPROPYLENE COLLAPSIBLE 55 x 16mm & STACKABLE 55 x 18mm x 20mm IN-LINE 10 x 16mm IK130 9 x 18mm IK131 8 x 20mm IK135 BASE PLATE 156x202mm 1K134 BOX 12 x 21mm 1K x 21mm 1K562 HOLE 'n PEG 12 08TTR6H6P WOOD Spring steel with wooden handle CATALOGUE # HOLDER CATALOGUE # BRUSH

111 thermometers Ascertaining temperatures Solid 6-7mm stem, calibrated for total immersion Yellow enamel backing MERCURY RED SPIRIT RANGE 0 C/TYPE CATALOGUE # CATALOGUE # -10 to + 50/60 08MT050 08ST to MT110 08ST to MT150 08ST to MT to MT to + 50 max/min 08MMT3050 Soil 08ST80S thimbles Order requirements: Operation: In a soxhlet extractor when it is required that the extracted material be weighed Sintered disc Flame polished rim Porosity of sintered disc The thimble is slid into a soxhlet extractor that has a B34, or bigger, socket SIZE mm CATALOGUE # 26 x x

112 tilt measures Alternate names: Set: Kipp's measures Dispensing fixed amounts of liquid B24 ground cone Body GL32 screwcap Inner bulb measures Screw cap instead of ground cone Alternate size ground cone Hooks for retaining springs CAPACITY ml CATALOGUE # SET 2, 5 & , 25 & & timers LCD display Count down and up to 99 minutes Memory storage has mode select and clock Battery Magnet CATALOGUE #

113 tubing Pack size: Generally for air and water lines in apparatus assemblies Connectors Tubing clamps 15 meter roll ID x OD mm CATALOGUE # LATEX 5 x L 6 x L 6 X L 6 x L SILICONE 4 x AS 5 x S 6 x S 6 X S 8 x S PVC 3 x P 8 x P NATURAL RUBBER: Red 8 x Orange 8 x 12 1K3865 NITRILE 8 x JOINERS For 8mm id tubing CATALOGUE # Polypropylene TUBING ID mm CATALOGUE # DISCONNECTOR K K436 CONNECTOR K K512 Y CONNECTOR 6 1K465 ADAPTERS 4-6-8/ K / K / K879 SCREWTHREAD & KECK QUICK CONNECTORS CATALOGUE # DETACHABLE: Straight Bent KECK: suction kit adapter for Buchner flask CLAMPS Stainless steel CATALOGUE # HOFFMAN MOHR

114 vacuum drying pistol Components: Order requirements: Distillation apparatus assemblies Two round bottom flasks Still head Stopcock/tubing adapter Jacketed drying tube Reversible coil condenser Tubing screw thread connection Hooks for retaining springs Sizes of sockets and cones Stopcock key CATALOGUE # ZGA vigreux flasks Distillation apparatus assemblies Pear shape flask Fractionating column B14 ground neck socket and Side ground cone Alternate ground sockets and cone Hooks for retaining springs CAPACITY ml CATALOGUE #

115 viscometers Obtaining kinematic viscosities of liquids CATALOGUE # BSU REVERSE FLOW CANNON-FENSKE OPAQUE CANNON-FENSKE ROUTINE UBBELOHDE volatile oil traps Oil separation at the end-stage of a distillation assembly Ground cones and sockets Stopcock with choice of glass or PTFE key Order requirements: Sizes of sockets and cones Stopcock key CATALOGUE # BRANIGAN volume dispensers Dispensing measured amounts of liquids Polyethylene and polyurethane Reservoir bottle Graduated dispenser Screwcap Dispensing tube 25ml DISPENSER 50ml DISPENSER CAPACITY CATALOGUE # CATALOGUE # 250ml K1475 K ml K1476 K ml K1477 K

116 volumetric flasks - glass Making up and storage of liquids to a fixed volume Class A Calibrated to contain for a reference temperature of 20 º C Ground neck socket Ring mark at volume level Enamel markings Plastic stopper Amberise Glass stopper Cleaning brush CONFORMITY WHITE MARKINGS BLUE MARKINGS CERTIFIED CAPACITY ml NECK mm CATALOGUE # CATALOGUE # CATALOGUE # 5 B B B B B B B B B B B B SCREW THREAD NECK Red PBT screwcap CAPACITY ml NECK CATALOGUE # 20 GL GL GL GL GL GL GL GL GL GL

117 volumetric flasks - plastic Polypropylene Class B Calibrated to contain for a reference temperature of 20 º C Ring mark at volume level Screw thread neck White screwcap POLYPROPYLENE PMP (TPX) CAPACITY ml NECK CATALOGUE # CATALOGUE # 25 GL18 1K GL18 1K1431 1K GL18 1K1432 1K GL25 1K1433 1K GL25 1K1434 1K GL25 1K1435 1K2494 Polypropylene and PMP (TPX) Calibrated to contain for a reference temperature of 20 º C Ring mark at volume level Stopper POLYPROPYLENE PMP (TPX) CLASS A CERTIFIED CAPACITY ml NECK CATALOGUE # CATALOGUE # CATALOGUE # 25 B14 1K B14 1K1485 1K B14 1K1486 1K B19 1K1487 1K B19 1K1488 1K B19 1K1489 1K wash bottles Polyethylene Screwcap Goose-neck tube CATALOGUE # GL25 vent-cap for 500ml VENT CAP NARROW NECK WIDE NECK INTEGRAL CAPACITY ml CATALOGUE # CATALOGUE # CATALOGUE # 50 1K K K182 1K1637 1K K1638 1K K185 COLOURED 500ml RED GREEN YELLOW BLUE CATALOGUE # CATALOGUE # CATALOGUE # CATALOGUE #

118 wash bottles - solvent Polyethylene Screwcap Goose-neck tube 500ml Imprint of solvent GL25 vent-cap CATALOGUE # DISTILLED WATER ACETONE METHANOL ISOPROPANOL ETHYLACETATE ETHANOL METHYLENE CHLORIDE DIMETHYLFORMAMIDE n-heptane n-hexane PETROLEUM ETHER TOLUENE XYLENE ACETONITRILE ACETIC ACID METHYLETHYLKETONE VENT CAP washing head Alternate names: Operation: Sprayer head Fitting to ground necks of bottles and flasks B24 ground cone Forcing air into the pipe expels the washing liquid or solvent from the spout CATALOGUE #

119 watch glasses Evaporation work. Cover for beakers and Erlenmeyer flasks for return of condensation Glass: flame-polished edge Polypropylene: base Soda-lime glass is not recommended for heating BORO-SILICATE SODA-LIME POLYPROPYLENE DIAMETER mm CATALOGUE # CATALOGUE # CATALOGUE # K K weighing boats Alternate names: Weighing scoops Weighing of small amounts of powders and emptying into vessels SINGLE USE Flame polished edges High impact polystyrene CAPACITY ml CATALOGUE # Pack size: 100 CAPACITY ml CATALOGUE # B B B B B

120 weighing jars Alternate names: Weighing bottles Weighing of substances on analytical scales. Storage of samples and specimens Also used as moisture crucibles Air-tight lid Remove lids before autoclaving LOW FORM TALL FORM CAPACITY ml DIAM. x HEIGHT mm CATALOGUE # DIAM. x HEIGHT mm CATALOGUE # 5 28 x x x x x x x x Polypropylene CAPACITY ml DIAM. x HEIGHT mm CATALOGUE # x 29 1K x 48 1K x 29 1K x 34 1K x 69 1K x 88 1K x 118 1K348 weighing pipettes Alternate names: Lunge-Rey pipettes Weighing or sampling of fuming or corrosive liquids Stopcock with choice of glass or PTFE key B10 ground cone Matching cover flask Matching cover tube CAPACITY ml CATALOGUE # > Order requirements: Stopcock key Cover tube or flask

121 wire gauze On tripod for even distribution of heat and avoidance of soot Galvanised wire mesh with ceramic centre SIZE mm CATALOGUE # 150 x witt filtration unit Components: Specialised vacuum filtration Reaction vessel Flat flange lid with ground socket Quick release clip (not shown) Tubing screw thread connection Quick connect tubing adapter CATALOGUE # woulff bottles Washing gas in apparatus assemblies and in a train Two or three ground necks of equal size Addition of stopcock at base Alternate ground socket sizes Stoppers TWO NECKS THREE NECKS CAPACITY ml NECK CATALOGUE # CATALOGUE # 100 B B B B B