水中钍的分析方法  

ANALYTICAL METHOD OF THORIUM IN WATER

作　　者：余耀仙[1] 

机构地区：[1]中国原子能科学研究院

出　　处：《辐射防护》1989年第1期47-51,共5页Radiation Protection

摘　　要：本文介绍了一种水中钍的分析方法。大体积环境水中钍经 Mg(OH)_2沉淀浓集、三烷基氧膦(TRPO)萃淋树脂分离纯化,用分光光度法测定。实验测定了钍在 TRPO 与硝酸、盐酸介质间的分配比,并对干扰离子的影响等进行了条件试验。方法的探测下限为0.01μg/L,对10L 水样(含0.5μg 钍)回收率为91.5±10.8%。An analytical procedure of trace amount of Th in large volumewater samples is described.The procedure consisted of concentration byprecipitation of magnesium hydroxide,separation and purification withTRPO levextrel resin and spectrophotometric determination of Th.Thedistribution ratio of thorium between TRPO and HNO_3(or HCl)wasdetermined The effects of some interfering ions and the optimum quantityof Mg to carry Th from large volume water were investigated.When thequantity of Th in 10 L water is 0.5μg,the fecovery was(91.5±10.8)%.The lowest detectable limit was 0.01 g/L.

关 键 词：钍 水 萃淋树脂 分光光度法 

分 类 号：TL272[核科学技术—核燃料循环与材料]