THE STUDY ON SIMULTANEOUS DETERMINATION OF IMPURE RARE EARTH & NON RARE EARTH ELE MENTS IN HIGH PURITY YTTRIUM OXIDE BY ICP AES

High purity yttrium oxide is widely used in various fields.The purity of products affects their quality directly.It is necessary to develop a sensitive method for the accurate determination of trace impurities in high purity yttrium oxide. In this paper,the authors put forward an analytical method that 30 elements,i.e.La,Ce,Pr,Nd,Sm,Eu,Gd,Tb,Dy,Ho,Er,Tm,Yb,Lu,Al,Ba,Ca,Co,Cr,Cu,Fe,Mg,Mn,Ni,Pb,Si,Sr,Ti,V,Zn in high purity Y 2O 3 are determined directly by ICP AES.The writers studied the spectral interference of yttrium and the effect of Y 2O 3 matrix and background,and selected the spectral lines of determined elements.The trace impure elements in Y 2O 3 standard are determined with standard addition method,and the determined results are used as low standard values,so that the determining errors can be cleared up because of neglecting trace impurity elements in Y 2O 3 standard,and the optimum operating condition is chosen.The detection limits of 30 elements are from 0.003 to 1.3μg/g.This method can satisfy the needs of quality control of high purity Y 2O 3 products and commodity inspection.