Aktivierungsanalytische Bestimmung von Chrom und Zink in biologischem Material

An activation analysis method has been developed for the determination of chromium and zinc in biological material. After the samples had been activated in a thermal flux of 7·10¹¹ n·cm⁻²·sec⁻¹ for 100 hours, both elements were separated from interfering radionuclides by means of ion-exchange and distillation processes. Gamma spectrometry was used to measure the activities of⁵¹Cr and⁶⁵Zn. The practical limits of detection were found to be 1·10⁻⁸ g for chromium and 1·10⁻⁷ g for zinc. The results of model experiments and of the analysis of blood taken from two individuals proved to be accurate and reproducible.