Inductively coupled plasma atomic emission determination of impurities in high-purity niobium and tantalum oxides after separation of the matrix on a Polyorgs VII sorbent

摘要

Two methods were suggested for determining impurities in niobium and tantalum matrices: determination by inductively coupled plasma atomic emission spectrometry (ICP-AES) without preconcentration and determination alter sorption separation of the matrix. Spectral interferences in the ICP-AES determination of impurities m the above matrices were examined. Interelement correction factors were calculated, and sorption behavior of niobium, tantalum, and some other elements on a Polyorgs VII sorbent was studied. From this study, conditions for sorption separation of the matrices were chosen. In addition, procedures for the ICP-AES determination of impurities in high-purity niobium and tantalum oxides were developed (the determination limits are n X 10-0.n #mu#g/g).