Sodium Bitartrate

The bitartrate ion can combine with potassium ion, also present in high concentrations in grapes, to form the soluble salt potassium bitartrate (also known as cream of tartar). In water sodium bitartrate is fairly soluble 1 g dissolves in 162 ml of water at room temperatureJ1 In alcohol solution (formed as fermentation of the wine yields ethanol), the solubility of potassium bitartrate is significantly reduced 8820 ml of ethanol are required to dissolve 1 g of the saltJ As a consequence deposits of potassium bitartrate form as the salt precipitates out of solution. 

Potassium Compounds Mix a few drops of sodium bitartrate TS with 5 mL of a clear, saturated solution of sample. No turbidity develops within 5 min. 

Potassium compounds impart a violet color to a nonluminous flame if not masked by the presence of small quantities of sodium. In neutral, concentrated or moderately concentrated solutions of potassium salts, sodium bitartrate TS (10%) slowly produces a white, crystalline precipitate that is soluble in 6 N ammonium hydroxide and in solutions of alkali hydroxides or carbonates. The precipitation may be accelerated by stirring or mbbing the inside of the test tube with a glass rod or by the addition of a small amount of glacial acetic acid or alcohol. 

Sodium Bitartrate TS Dissolve 1 g of sodium bitartrate (NaHC4H406 H20) in water to make 10 mL. Prepare this solution fresh. 

The Pt wire 1b then Immersed in hot water. A soln. saturated In sodium bitartrate and containing HbCl is added. The rubidium bltartrate is ppted. by cooling the mixture in ice. This kind of pptn. Is repeated five times. The fifth ppt. Is dissolved In hot water to which 1b added inactive Ba and Sr chlorides. After two successive carbonate or sulfate pptns., the final filtrate.is evaporated to dryness for the measurement of Hb activity. 

Benzyl Butyl Adipate 526-94-3 Sodium Bitartrate 557-05-1 Zinc Stearate... 

Molar tartaric acid and 0.1 molar sodium bitartrate IS 2.79... 

Molar sodium bitartrate and 0.01 molar sodium tartrate 18° 4.16... 

Procedure. A drop of the test solution is placed on filter paper and spotted with a drop of freshly prepared 0.2 % solution of sodium rhodizonate. A blue fleck or ring is formed if lead is present. When an intense reaction occurs, the blue fleck can be transformed to scarlet by spotting with a drop of buffer solution (pH = 2.8) containing 1.9 g sodium bitartrate and 1.5 g tartatic acid per 100 ml. 

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