火焰原子吸收法测定稀土元素

DETERMINATION OF RARE EARTH ELEMENTS BY AAS

稀土元素在原子吸收法中彼此不干扰,这是难分离稀土元素的一种较有效的理想的化学分析方法,此法的弱点是所有稀土元素在高温火焰中存在着不同程度的电离,影响灵敏度及检出限。为了减少这类影响,开展对基体效应的研究是很有意义的。文献报导了某金属或常见酸对稀土的影响。本文对经常存在的金属离子Na^+、K^+,NH_4^+、Ca^(2+)、Cd^(2+)、Fe^(3+)及La^(3+)(氯化物)及阴离子Cl^-、NO_3^-、SO_4^(2-)、ClO_4^-NH_4^+或K^+盐)和H_3PO_4、EDTA等对Nd、Eu、Y及Yb的影响进行了考察。

The present work describes the effect of enhancement and suppression of some common cations, anions and EDTA for rare earth Nd, Eu, Yb and Y. The results indicated the matrix of cation effect is greater than that of anion for the each other rare earths and some cations, anions, get many different effects for Nd、Eu、Yb and Y.