阳离子交换分离ICP/MS测定U_3O_8中的微量稀土元素

Determination of Trace Rare Earth Elements in U_3O_8 by ICP-MS After Cationic Exchange Separation

用硝酸溶解 U3 O8,通过阳离子交换柱 ,实现稀土元素与铀的分离。铀中的稀土元素回收率为 98%～1 0 6%。方法的检测限为 0 .1 ng/ g(3 σ,n=6) ,并讨论了分离条件、仪器参数的最优化选择及残留铀量对稀土元素测量的影响。

The rare earth element was separated from U_3O_8 by the cationic exchange column after U_3O_8 sample was resolved in the nitric acid. The recovery rates of the rare earth elements extracted from U_3O_8 were 98%~101%. The detect limit of the rare earth elements was o.1 μg/g(3σ, n =6). The optimization of the separating factor and instrumental parameter, and the effect of the residual uranium amount on measuring rare earth element was discussed in great detail.