The Measure of all Things. Volumetric Solutions from Merck

Transcription

1 The Measure of all Things Volumetric Solutions from Merck

2 Titration is the oldest but still the most precise procedure in chemical analysis. However, such precise analyses require accurately adjusted volumetric solutions. Depending on the analytical problem on hand, acids, bases, reducing and oxidizing substances as well as complex formers are used in both aqueous and non-aqueous solutions. Regardless of the type of problem you have to tackle, you will find the right volumetric solution in the Merck product range.

3 Typical for Merck: Quality control throughout the entire production chain Volumetric solutions are produced at Merck under the most stringent of control conditions. These include temperature control, defined and constantly monitored titration units as well as standardized procedures in the quality control itself. In this way we can guarantee that all volumetric solutions batch for batch are adjusted with a high degree of precision to an exact titer. Batch-specific Certificate of Analysis A Certificate of Analysis for each and every batch of volumetric solution can be called up via web site The Certificate of Analysis documents the concentration of the substance in mol/l as well as the titer of the batch as measured at 20 C. It also contains information on the primary standards used during testing. These, of course, are traceable directly to Standard Reference Materials (SRM) of the National Institute of Standards and Technology (NIST), Gaithersburg, USA. In addition, the date of testing and the expiry date are indicated, including on the packaging. The titer indicated on the Certificate of Analysis applies to the original closed package and is valid in this condition throughout the entire shelf life of the product. The stability of the solution subsequent to the package being opened is, however, dependent on the chemical properties of the volumetric solution. Solutions of substances such as iron(ii) salts that are known to be unstable or substances such as sodium hydroxide that absorb carbon dioxide should be recalibrated before use against a known volumetric standard. The concentration tolerance of most ready-to-use solutions is 0.1%; Titrisol concentrates have a maximum of 0.2 %. Reliable and documented quality

4 Flexible: Concentrates For those labs that have to cope with a variety of applications, we provide most volumetric solutions as Titrisol ampoules. Each ampoule contains a precisely defined amount of substance normally they are then diluted to 1 liter for use. Other concentrations can be obtained simply by diluting appropriately Reliable and precise: Ready-to-use solutions Most analytical labs now employ ready-to-use volumetric solutions. They have a maximum titer deviation of only 0.1 % and are thus highly precise. In addition, potential sources of error e.g. dilution with contaminated water or the use of non-calibrated volumetric flasks are excluded. Various package sizes are available for different applications. Titrisol ampoules Volumetric solutions that can be prepared rapidly and precisely Concentrations can be prepared as required Space-saving reservoir pack 5-year shelf-life guarantee PE bottles and canisters Packs suitable for laboratory use. Non-breakable bottles and canisters made of contamination-free polyethylene. Direct connection possible to all common titrators via the S40 adapter system.

5 Convenient: Large packs of stable titer For those labs that require larger quantities of volumetric solutions, the 4-liter and 10-liter Titripac pack is a practical and economic alternative. A closed system, it guarantees absolute stability of the concentration of substance from the first to the last drop. A suitable pack for every application Merck Titripac volumetric solutions of high quality in exclusive reservoir packs. Titripac Reliable closed system Sealed pack prevents atmospheric contamination Stable titer from the first to the last drop Integrated withdrawal tap for immediate use Liner and external carton can be easily separated for disposal Exclusively available from Merck Can be direct connected with the titrator No additional titer determinations No contaminated left overs

6 The measure of all things: Volumetric solutions from Merck

7 Ordering information for volumetric solutions Article Concentration Titrisol ampoules: Ready-to-use Titripac 4 l 1 l solution solution Titripac 10 l Cat. No. Cat. No. Cat. No. Acetic acid 0.1 mol/l (0.1 N) mol/l (1 N) mol/l (1 N) 25 l: Ammonium cer(iv)nitrate solution 0.1 mol/l (0.1 N) 1 l: Ammonium iron(ii)-sulfate solution 0.1 mol/l (0.1 N) Ammonium thiocyanate solution 0.1 mol/l (0.1 N) l: Barium chloride solution 0.05 mol/l (0.1 N) Barium perchlorate solution mol/l 1 l: in 2-propanol/water (80 : 20) Bromide-bromate solution 0.05 mol/l (0.1 N) Cer(IV)sulfate solution 0.1 mol/l (0.1 N) 1 l: Copper sulfate solution 0.1 mol/l 1 l: Copper-di-ammonium 0.1 mol/l 0.5 l: Titriplex solution Hanus solution 0.1 mol/l in acetic acid 1 l: (iodomonobromide solution) Hyamine 1622 solution mol/l 1 l: for the determi nation of anionic tensides Hydrochloric acid 0.01 mol/l (0.01 N) mol/l l: l: l: l: l: mol/l (0.1 N) 1 l: in 2-propanol mol/l (1/2.8 N) 10 l: mol/l (0.5 N) l: l: l: mol/l (1 N) l: l: l: l: l: l : mol/l (2 N) 1 l : mol/l (1/0.28 N) 10 l: mol/l (5 N) 1 l: mol/l (1 N) Iodide-iodate solution 1/128 mol/l I2 (1/64 N) Iodine solution 0.05 mol/l (0.1 N) l: mol/l (1 N) 1 l:

8 Article Concentration Titrisol ampoules: Ready-to-use Titripac 10 l 1 l solution solution Cat. No. Cat. No. Cat. No. Mercury(II)nitrate solution 0.05 mol/l (0.1 N) 1 l: Nitric acid 0.1 mol/l mol/l (1 N) mol/l (10 N) 1 l: Oxalic acid solution mol/l (0.01 N) mol/l (0.1 N) Perchloric acid 0.1 mol/l (0.1 N) 1 l: in water-free acetic acid Potassium bromate solution 1/60 mol/l (0.1 N) Potassium dichromate solution 1/60 mol/l (0.1 N) /24 mol/l (0.25 N) 1 l: mol/l 1 l: Potassium hydroxide solution 0.1 mol/l (0.1 N) l: mol/l (0.1 N) 1 l: in ethanol 2.5 l: mol/l (0.1 N) 2.5 l: in methanol 0.1 mol/l (0.1 N) 1 l: in 2-propanol 0.5 mol/l (0.5 N) l: mol/l (0.5 N) 1 l: in ethanol 2.5 l : mol/l (0.5 N) 1 l: in methanol 1 mol/l (1 N) l: mol/l (1 N) 1 l: max. 0.4 ppm Ca 2.0 mol/l (2 N) 2.5 l: in methanol Potassium iodate solution 1/60 mol/l (0.1 N)

9 Article Concentration Titrisol ampoules: Ready-to-use Titripac 4 l 1 l solution solution Titripac 10 l Cat. No. Cat. No. Cat. No. Potassium permanganate solution mol/l (0.01 N) mol/l (0.1 N) mol/l (0.1 N) 1 l: standardized with sodium thiosulphate 0.02 mol/l (0.1 N) 1 l: standardized with oxalate 0.05 mol/l (0.25 N) 2.5 l: Silver nitrate solution 0.05 mol/l (0.05 N) 1 l: mol/l (0.1 N) l: l: l: l: mol/l (1 N) 1 l: Sodium arsenite solution 0.05 mol/l (0.1 N) 1 l: l: Sodium carbonate solution 0.05 mol/l (0.1 N) Sodium chloride solution 0.1 mol/l (0.1 N) Sodium hydroxide solution 0.01 mol/l (0.01 N) mol/l (0.02 N) 0.5 l: mol/l (0.1 N) l: l: l: l: l: mol/l (0.111 N) 25 l: mol/l (0.2 N) 1 l: l: l: mol/l (0.25 N) l: l: mol/l (0.33 N) 1 l: l: mol/l (1/2.8 N) 10 l: mol/l (0.5 N) l: l: l: mol/l (1 N) l: l: l: l: l: mol/l (1 N) 25 l: mol/l (2 N) 1 l: l: mol/l (4 N) 5 l: mol/l (5 N) 1 l: mol/l (1 N) 25 l:

10 Article Concentration Titrisol ampoules: Ready-to-use Titripac 4 l 1 l solution solution Titripac 10 l Cat. No. Cat. No. Cat. No. Sodium methylate solution 0.1 mol/l (0.1 N) 1 l: Sodium thiosulfate solution 0.01 mol/l (0.01 N) mol/l (0.1 N) l: l: l: l: Sulfuric acid mol/l (0.01 N) mol/l (0.1 N) l: l: l: l: mol/l (0.5 N) 1 l: l: l: mol/l (1 N) l: l: l: l: mol/l (5 N) 1 l: Tetra-n-butyl- 0.1 mol/l (0.1 N) 0.5 l: ammonium hydroxide solution in 2-propanol/ 1 l: methanol Tetramethylammonium hydroxide 0.1 mol/l (0.1 N) 0.25 l: solution in 2-propanol/methanol 1 l: Titriplex III solution (Na2-EDTA) 0.01 mol/l mol/l l: l: l: Titriplex IV solution (Na2-DCTA) 0.1 mol/l 1 l: l: Wijs solution 0.1 mol/l 1 l: (iodomonochloride in acetic acid) 2.5 l: l: Zinc sulfate solution 0.1 mol/l l: Volumetric solution Article Concentration Ready-to-use solution Cat. No. Acetic acid 1 mol/l (1 N) 25 l: Hydrochloric acid 1 mol/l (1 N) 25 l: Sodium hydroxide solution 1 mol/l (1 N) 25 l: mol/l (1 N) 25 l: Further volumetric solutions material acc. Ph. Eur. on request.

11 CertiPUR secondary reference materials for volumetry Reliable reference materials for volumetric analysis Merck supplies additional reference materials for the adjustment and control of volumetric solutions. If reliable information on the titer of a volumetric solution is to be obtained, these substances must correspond absolutely to the composition designated by the chemical formula. Analysis Article Package size Cat. No. Acidimetry Sodium carbonate 80 g Tris(hydroxymethyl)aminomethane 80 g Alkalimetry Potassium hydrogen phthalate 80 g Benzoic acid 60 g Argentometry Sodium chloride 80 g Complexometry Zinc 100 g Calcium carbonate 50 g Iodometry Potassium iodate 100 g Redox titration Iron(II)ethylenediammonium sulfate 80 g Potassium dichromate 80 g Di-sodium oxalate 60 g CertiPUR reference materials In order to provide the highest possible quality standard and precisely defined tolerances, Certipur reference materials are prepared under the most stringent of controls and measured with the highest possible degree of accuracy for the given applications. CertiPUR standard solutions are directly traceable to the standard reference materials provided by the National Institute of Standards and Technology (NIST), Gaithersburg, USA.

12 Merck KGaA Analytical Reagents Darmstadt, Germany Fax: internet: W Release date: December 2007 We advise our customers on technological matters to the best of our knowledge under given circumstances. Our information and recommendations are provided without obligation or liability for us. Existing laws and regulations are to be observed in all cases by our customers. This also applies in respect to any rights of third parties. Our suggestions do not relieve our customers of their own responsibility of checking the suitability of our products for the envisaged purpose. Quotations from our literature are only permitted with our written authority, and the source must be stated.