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Clinical Chemistry 9: 668-681, 1963;
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Clinical Chemistry, Vol 9, 668-681, Copyright © 1963 by the American Association for Clinical Chemistry

Microdetermination of Chloride in Blood Plasma and Cells, by Spectrophotometric Analysis Using Solid Silver Iodate

F. Lee Rodkey 1 and Julius Sendroy Jr. 1

1 Division of Chemistry, U. 5. Naval Medical Research Institute, National Naval Medical Center, Bethesda, Md.

As an extension of the silver iodate method of Sendroy, a convenient, reproducible, and sensitive method for analysis of chloride in 0.02-ml. samples of serum, whole blood, or red cells is described. The procedure involves (1) preparation of a protein-free filtrate of the sample, (2) Agl03 reaction with the filtrate, and (3) spectrophotometric analysis of iodine as the quantitative measure of the amount of iodate exchanged for chloride. Conditions important for each of these steps have been investigated. A precision of ± 0.85 (S.D.) mM CI per liter has been found for this method, the results of which are within 1% of those obtained by the macro nitric acid digestion method of Van Slyke.






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