Potassium Acetate Solution

Add a few drops of acetic acid and a little ammonium or potassium acetate solution to a moderately strong solution of tartaric acid or a neutral tartrate. On stirring with a glass rod, the acid potassium or ammonium tartrate will be precipitated. 

Oxalic and Tartaric Acids. — On dissolving 1 gm. of citric acid in 2 cc. of water, and adding 10 drops of a 1 2 potassium acetate solution and 5 cc. of alcohol 85 per cent, no turbidity should be produced, nor should a crystalline deposit form within two hours. 

Chlorides. — Dilute 5 cc. of potassium acetate solution with 20 cc. of water, and add 5 cc. of nitric acid followed by silver nitrate solution. At most a slight opalescent turbidity should develop. 

Quantitative (total tartaric acid). 100 c.c. of the vinegar are treated in a beaker with 1 c.c. of 20% potassium acetate solution and 15 grams of powdered potassium chloride. When the latter has dissolved, 20 c.c. of 95% alcohol are added, the subsequent procedure being as indicated for the determination of the total tartaric acid in wine q.v., p. 193). 

After the anhydrous potassium acetate has been dried and its exact weight has been measured, acetylation reactor 5 receives at agitation from batch box 1 through a siphon under the layer of toluene potassium acetate solution a required amount of phenyltrichlorosilane. The temperature (SOSO °C) is regulated by changing the speed of phenyltrichlorosilane supply and intensity of cooling reactor 5 (by sending water into the jacket). After the introduction of phenyltrichlorosilane the mixture in apparatus 5 heated... 

Kolbe and Kampf,1 on electrolyzing a concentrated potassium-acetate solution obtained at the anode acetic methyl ester, formic methyl ester, ethane, ethylene, and carbon dioxide and at the cathode hydrogen and potassium hydroxide. In an alkaline solution of the salt Bourgoin2 obtained, amongst other products, sodium formate (by reduction of the carbonic acid) but so far as hydrocarbons were concerned he could only prove the presence of ethane and ethylene. 

Bromine-Acetic Acid Solution On the day of use, dissolve 5 mL of bromine in 145 mL of the Acetic Potassium Acetate solution. 

Using a Pasteur pipette equipped with a dropper bulb, begin to add well-mixed slurries of CM-Sephadex in potassium acetate solutions to the appropriate columns. Allow the columns to drip while adding increasing increments of the slurried CM-Sephadex until the settled resin bed reaches a height of 4-5 in. Do not allow the columns to run dry that is, do not allow the top fluid surface to penetrate into the settled resin bed. Instead, add small aliquots of 0.1 M potassium acetate buffer, pH 6.0, or 1.0 M potassium acetate buffer, pH 6.0, to the appropriate columns to keep the fluid surfaces above the resin bed. 

Potassium acetate solution (60 ml of 5 M potassium acetate, 11.5 ml of glacial acetic acid, 28.5 ml of distilled water)... 

Add 150 jA of 3 M potassium acetate solution to each tube. Cap and invert several times to mix. The precipitate that forms contains much of the denatured proteins produced in step 4, as well as chromosomal DNA that was not able to renature correctly when the pEl was quickly lowered. Incubate the tubes on ice for 10 min. 

Constant-temperature bath set at 25°C emery paper conductivity water (1500 mL) precisely 0.02000MKC1 solution (300 mL) 0.02MHC1 solution (200 mL) 0.02 A/potassium acetate solution (200 mL) 0.05 M acetic acid (250 mL). 

For purification of the Squibb Primary Reference potassium phenoxymethyl penicillin,the starting material was dissolved in water and crystallized by the addition of a saturated potassium acetate solution. These crystals were then redissolved in water, diluted with butanol, and crystallized again by an azeotropic vacuum distillation to yield the final product Purification and isolation of the potassium salt were the subjects of two Czechoslovakian patents62, 63. 

Ion exchange resins have occasionally been used to adsorb fiavones from aqueous solutions they can then be eluted with alcohol. Weakly polar substances have been separated by partition chromatography on silica gel, impregnated with dimethyl sulphoxide [156] benzene was used as solvent. An interesting separation is that of betacyanins with an aqueous potassium acetate solution on polyamide [198]. 

This method is particularly useful in determining the stability constants of the complexes containing the metal ion capable of forming a sparingly soluble salt whose solubdity product is known. Moreover, the complex formed should be fairly soluble. The stability constant of the complex can be determined by measuring the increase in solubiUty of the salt caused by the presence of the ligand. Consider the reaction of silver acetate with acetate ion. If a sodium or potassium acetate solution of known high... 

Carry out the gelatinisation and neutralisation of the mixture as above. Add 1 ml of 0 1 N iodine, followed by 40 ml of a reagent made by adding 4 ml of 10 per cent potassium acetate solution to 100 ml of 50 per cent ethanol. Leave the mixture for ten minutes. Decant the bulk of the liquid into a tared medium alundum crucible, wash the precipitate in the beaker twice with 50 per cent ethanol and twice with 95 per cent ethanol then transfer the precipitate to the crucible, wash with a little more ethanol, dry and weigh. 

Citric acid does not interfere. If no potassium salts are present 2 ml of 20 per cent potassium acetate solution should be added. Often inexplicable results have been obtained with this method, a heavy precipitation occurring with the ethanol but no acid salt being formed. 

For lithium and potassium acetates = 0.11 liter/mole.) The appearance of a charge in the final state was not taken into account. In [21, 33] it was concluded that iodobenzene is reduced in the adsorbed state, since salting out affects the half-wave potential. The displacement of Eiy for iodobenzene resulting from salting out amounted to 25 mV in 2 N lithium, sodium, and potassium acetate solutions, and somewhat less in 2 N cesium acetate solution. The... 

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