铀化合物中微量钽的萃取色层分离-ICP/AES测定  

A STUDY ON THE DETERMINATION OF TRACE TANTALUM IN URANIUM COMPOUNDS BY HORIZONTAL ICP/AES

作　　者：关景素 杨晓进[1] 高炳华[1] 刘英梅 

机构地区：[1]中国原子能科学研究院,北京102413

出　　处：《原子能科学技术》1993年第1期42-47,共6页Atomic Energy Science and Technology

摘　　要：以CL-TBP萃取色层分离-水平式ICP/AES测定铀化合物中微量Ta。方法是先将铀化合物转化成硝酸铀酰,再以含0.2mol·l ?HF的3mol·l^(-1)HNO_3溶液溶解微量Ta,然后进行分离和测定。取样0.3g,测定下限为0.5×10^(-6);当Ta含量为1.7×10^(-6)-5.0×10^(-6)时,方法的加入回收率在88%106%范围内;相对标准偏差≤10%。A method for the determination of trace tantalum in uranium compounds such as UO_2, U_3O_8, UF_6or UF_4 is developed. The sample is converted to UO_2(NO_3)_2 and evaporated to near dryness, then add0.5 ml 3 mol·l^(-1) HNO_3--0.2 mol·l^(-1) HF solution to dissolve the trace tantalum. After that the tanta-lum is separated from uranium with TBP levextrel resin chromatography and the tantalum is determinedwith horizontal ICP/AES. With a sample of 0.3 g, the determination limit of tantalum is 0. 5×10^(-6), the recovery is in the range of 88%--106%, the relative standard deviation RSD is≤10%.This method is simple and rapid.

关 键 词：钽 铀化合物 光谱分析 萃取 

分 类 号：TL271.4[核科学技术—核燃料循环与材料]