【摘要】 本文介绍一种测定环境水中钍浓度的分析方法。１０Ｌ环境水样用氢氧化铁沉淀法浓集钍，阴离子交换树脂除去杂质，分光光度法测定钍浓度。全过程用２３４Ｔｈ作为产额示踪剂，进行回收率校正。方法探测下限为１．９×１０－５Ｂｑ／Ｌ，回收率均值为（８０．５±４．７）％。用本方法对本省１１个地区的自来水、井水、河水、湖水及温泉水进行了分析，结果表明，各种水样中钍浓度的均值为０．２０～２．６３ｍＢｑ／Ｌ。更多还原

【Abstract】 The paper introduces an analysis method of Th in environmental waters.The Th was concentrated by Fe(OH) 3 precipitation,separated from impurities by passing through a anion exchanger column,and determined by spectrophotometry. 234 Th was used as yield tracer.The average recovery was determined to be (80.5±4.7)%.The Th concentrations in water samples taken from 11 regions of Jiangsu province were determined,their average concentrations lie in the range of 0.20～2.63 mBq/L. (更多还原