Abstract
A method has been worked out for the determination of Mn, Cu, Zn, K and Na in tissue biopsies weighing between 10 and 50 mg. The samples were dried, packed in polyethylene containers and irradiated at a flux of 1.8·1012 n·cm−2·sec−1 for 48 hrs. They were dissolved and separated into five fractions by ion exchange chromatography. Managenese was precipitated and counted as MnO2 and zinc as quinaldate. Copper and potassium were counted in solution. Sodium was taken up in hydrated antimony pentoxide (HAP) and counted in that stage. Accuracy, precision and specificity were determined by recovery experiments and by analysis ofBowen's biological standard.
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