[Determination of non-rare earth impurities including Cu, Fe, Ca and Ni in samarium oxide by ICP-AES]

The direct determination of non-rare earth trace impurities including Cu, Fe, Ca and Ni in high purity Samarium oxide by means of ICP-AES is presented in this paper. By using orthogonality experimentation, we studied main factors of influential determination and selected compromise condition of simultaneous determination of Cu, Fe, Ca and Ni. Influence of matrix concentration was discussed. We used the method of matrix match and subtraction background. For the sample solution containing 5mg/mL of Sm2O3 the determination limits were 0. 0003% for Cu, 0.003% for Ni, 0.001% for Ca and Fe, respectively. The relative standard deviation was in the range of 2.6-9.2%. The recovery ratio of these elements was in the range of 90-110%. The method is simple and rapid. It was fit to productive control analysis and determination of production.