利用选择性特效树脂富集分离岩石样品中的锶钐和钕

使用目前国际上几种常用的特效树脂:锶树脂(SR)、稀土树脂(RE)和镧系树脂(LN)对岩石样品中Sr、Sm和Nd的分离富集效果进行了试验,结果表明,按厂家提供的流程,SR树脂可回收98%左右的Sr,而且残余的Rb不到2%;RE树脂回收的Sm和Nd只有70%左右;而联合利用RE和LN树脂,并配合SR树脂的使用,可以将Sm和Nd的回收率提高到90%左右;LN树脂可以很好地分离Sm和Nd,并且回收的Nd可占总样量的85%左右.

Separation of Sr, Sm and Nd in Mineral and Rock Samples Using Selective Specific Resins

The separation and preconcentration efficiency of Sr, Sm and Nd in rock and mineral samples by several selective specific resins, such as SR resin for Sr separation, RE resin and LN resin for Sm and Nd separation, were tested. Using inductively coupled plasma mass spectrometry (ICP-MS), the concentrations of the special elements in the solutions collected after each step of the standard separation procedure were determined and calculated to the percentage relative to the total amounts in the samples. The results show that about 98% of Sr in the samples can be recovered with <2% of Rb remained by SR resin and about 70% of Sm and Nd in the samples can be recovered by RE resin. By using column filled with mixed resins (SR+ RE+ LN), the recovery for Sm and Nd researches about 90%. And Sm and Nd can be well separated by LN resin with recovery of about 85% for Nd.