食品中~(241)Am的测定

DETERMINATION OF 241Am IN FOOD

摘要: <正> ~(241)Am(α辐射体)为极毒的放射性核素,它对环境引起放射性污染后可经过生物链进入人体产生危害,且长期存留,不易排出。因此,对食品中~(241)Am的测定正日益受到人们的重视。自从1963年以来,关于尿、组织、大便和空气滤料等样品中镅的测定方法报道较多,而食品中镅的测定方法则至今未见详细报道。本文参照文献7中的某些实验条件,拟定了1克食品灰样中~(241)Am的测定程序。全程操作6个样品的时间为一天半(不包括放射性测量)。

Abstract: A method for the determination of 241Am in food is reported in this paper. 241Am in food is first separated and purified by PMBP-TOPO-cyclohexzne synergistic extraction and HDEHP-Kel-F micro column extraction chromatography, and then collected and prepared directly into a source for further determination. The recovery of 24·Am in one gram ashed sample of food is over 60%. The decontamination factors of U, Th, 237Np, 238Pu and 242Cm are all over 103. It is suitable for routine analysis of 241Am in ordinary food.