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对稀土元素同位素组成的研究,要求纯净的单一稀土元素样品作质谱测定,但这种元素的相互分离很困难。目前一般采用离子交换法经多次分离而制备,程序比较麻烦。我们根据本实验室的具体条件,采用纸色层法取得了同样满意的结果。这种方法设备简单,操作方便,且具有直观的优点。经过大量的条件实验,并测定了一些稀土矿物中钕(Nd)同位素,结果证明,采用纸色层法分离出来的单一稀土元素样品(Nd),完全符合质谱分析的要求。
The study of isotopic compositions of rare earth elements requires pure single rare earth elements for mass spectrometry, but the separation of these elements is difficult. At present, the ion exchange method is generally used after multiple separation and preparation, the procedure is troublesome. Based on the specific conditions of our laboratory, we obtained the same satisfactory result with the paper color method. This method has the advantages of simple equipment, convenient operation and intuitive advantages. After a large number of experimental conditions and the determination of neodymium (Nd) isotopes in some rare earth minerals, the results show that the single rare earth element sample (Nd) separated by the paper color layer method fully meets the requirements of mass spectrometry analysis.