Abstract
Summary. 1) The electrodialytic method for the determination of total cations gives 100 % yield for Na+, K+, Ca++. 2 Por Mg++ a modification is reported consisting in transferring the membrane to the titration flask after completed electrodialysis. Hereby the yield is increased from 20% to 90%-95%. 3 The electrolysis time for Na+ and K+ must be 1 1/2 hours, and 3–4 hours for Ca++ and Mg++. 4 By the application of cellophane membranes with analysis of sera, a standard deviation of ± 1.0 to ± 1.3 m. eq. was found and a standard error of mean of ± 0.3%. 5 The proteins did not influence the yield of cations in the serum analyses.
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