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An Isotopic Method for Estimation of Urinary Potassium

Sydney, Australia

ABSTRACT

An isotopic method for estimating urinary potassium has been described. It appears from our results that the method is accurate, sensitive and easily reproducible. Because the method is more time consuming than flame-photometry it would not be suitable for the routine bio-chemical laboratory. It would be suitable, however, for the research laboratory where a high degree of accuracy is required. The method can be suitably modified to estimate smaller or greater quantities than the present range, i.e. 1–100 mEq/ litre by adjustment of ratio of sodium cobaltinitrite to urine.

FOOTNOTES

¹ Department of Physics, St. Vincents Hospital, Sydney, Australia.

² Department of Physics, University of New South Wales, Sydney, Australia.