小型交换柱上稀土元素的选择性分离及其等离子炬光谱测定

Selective Separation of R.E.on Small Cation Exchange Column followed by ICP Spectrometric Determination

岩矿中稀土总量及其分量的分离一般采用大型交换柱,本文试用强酸1×8阳离子交换树脂,置于0.6×11厘米的小柱子上,考察了钇与铝分离的可能性,以硝酸—酒石酸和盐酸作洗提剂,可使多元素连续洗提,提供了本方法的各项质量指标。经大批样品的生产考验,本法具有较高的分离选择性,效率有所提高,稀土回收完全,分析结果均较满意。

The miniaturization of column and the selective separation of R.E.are discussed in this paper.The rare earth elements are quantitativly separated from Zr,Ti,U(VI),Bi(III),Ba,Sr,Ca,Mg,Fe,AI,monovalent and some other divalent metals by elution with 1.25 N nitric acid-4%tartaric acid-0.1%ascorbic acid from a column(0.6-11cm)of cation exchange resin.The retained RE elements can be completely eluted with 3 N hydrochloric acid.The remained thorium can be finally eluted with 10 ml of 2%ammonium oxalate and determined.This method has been used for measuring the contents of fifteen RE elements in minerals and rocks with ICP-AES.