The Journal of Biological Chemistry, Volume 21

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American Society for Biochemistry and Molecular Biology, 1915 - Biochemistry
Vols. 3-140 include the society's Proceedings, 1907-41
 

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Page 349 - The titration is performed in the presence of nitrous acid and starch, so that the first drop of iodide in excess of the silver present is changed to free iodine and gives the blue starch-iodine color. The optimum acidity for the end-point is fixed by the addition of trisodium citrate in amount equivalent
Page 348 - After a few minutes the liquid is filtered through a dry folded filter, and a water-clear filtrate obtained. Occasionally a small amount of charcoal passes through with the first few drops of filtrate, but this can be poured back through the same filter, and the filtrate then obtained is absolutely clear and colorless.
Page 211 - Edna L. Ferry and Alfred J. Wakeman. (From the Laboratory of the Connecticut Agricultural Experiment Station and the Sheffield Laboratory of Physiological Chemistry in Yale University,
Page 525 - 1 The expenses of this investigation were shared by the Connecticut Agricultural Experiment Station and the Carnegie Institution of Washington, DC
Page 93 - The expenses of this investigation were shared by the Connecticut Agricultural Experiment Station and the Carnegie Institution of Washington, DC : TB
Page 350 - water. The citrate and nitrite are then added, and the mixture is heated until all is dissolved. The solution, while still hot, is filtered through cotton, the filter washed with hot water, the filtrate allowed to cool, and made up to 1000 cc. Filtration removes insoluble substances
Page 349 - A solution of m/58.5 potassium iodide, 1 cc. of which is equivalent to 1 mg. of NaCl. KI 3.0 gm. Water to 1000 cc. This solution is standardized against the silver solution by adding 5 cc. of the latter to 5 cc. of Solution
Page 349 - solution is standardized against the silver solution by adding 5 cc. of the latter to 5 cc. of Solution III and titrating with the iodide solution to the blue end-point. The
Page 349 - and titrating with the iodide solution to the blue end-point. The iodide solution is then diluted to such a degree that 10 cc. are exactly equivalent to 5 cc. of the silver solution.
Page 350 - silver nitrate solution (Solution I) are added, and the whole is made to the 25 cc. mark with water. This will precipitate up to 10 mg. of NaCl. In samples with high percentage of chloride, only enough filtrate is taken to keep within this limit of 10 mg. Two drops of

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