THE determination of potassium is more troublesome than that of any other biologically important cation; at the same time there are many conditions involving variations in the electrolyte content of the body fluids in which accurate estimations of potassium are desirable. It therefore appeared worth while to try to devise an analytical method for potassium which should be simpler than those at present in use; this paper describes a new method which offers certain advantages of simplicity whilst giving a degree of accuracy not significantly less than those claimed for the more time-consuming procedures.
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C. R. Harington (1941) studied this question.