荧光法测定铀溶液中的微量钍  

Analytical Method of Micro Thorium in Nuclear Products

作　　者：钱红娟[1] 张丽华[1] 苏涛[1] 赵立飞[1] 吴继宗[1] 刘焕良[1] 

机构地区：[1]中国原子能科学研究院放射化学研究所,北京102413

出　　处：《核化学与放射化学》2010年第4期210-215,共6页Journal of Nuclear and Radiochemistry

摘　　要：研究了Th4+与UO22+、Zr4+、Fe3+等离子在CL-TBP萃淋树脂柱上的分离。确定了Th4+在CL-TBP萃淋树脂上的吸附条件和洗脱条件。建立了Th、桑色素三元络合物测定微量钍的荧光分析方法,线性范围为0～500μg/L,检出限为0.1μg/L,对于1μg/L和50μg/L样品,测量精密度分别为2.5%和0.6%。对模拟样品进行分析,回收率为92%～100%,相对标准偏差优于3%。An exactly analytical method is needed to detect the thorium in nuclear products.The nuclear sample is complexity,strong radioactivity,and toxicity.It should be separated before be measured.The separate conditions of Th（Ⅳ） with coexisting ions such as UO 2＋ 2,Fe3＋,Zr4＋etc. by CL-TBP resin were studied.A new fluorescence analysis method for the determination of thorium was developed.The linear ranger is 0-500μg/L and the detection limit is 0.1μg/L.For samples as 1μg/L and 50μg/L,precisions are 2.5%and 0.6%.For simulate sample,the relative standard deviation is 3% and the recovery is between in 92%-100%.

关 键 词：钍 CL-TBP萃淋树脂 荧光法 

分 类 号：O657.31[理学—分析化学]