Determination of trace selenium,cerium,zirconium,tantalum and tellurium in nickle-based alloy N06625 by inductively coupled plasma mass spectrometry
The contents of Se,Ce,Zr,Ta and Te in nickel-based alloy will affect its processability,thermo-plasticity,fatigue performance and creeping property.Therefore,their determination is of great signifi-cance.The sample was dissolved with hydrochloric acid,hydrogen peroxide and hydrofluoric acid.78Se,140Ce,90Zr,181Ta and 125Te were selected as test isotopes.The calibration curve was prepared by standard addition method to overcome the matrix effect.103Rh was used to correct 78Se and 90Zr,while 115In was used to correct 140Ce,181Ta and 125Te.Consequently,a method for simultaneous determination of trace Se,Ce,Zr,Ta and Te(mass fraction below 0.005％)in nickel-based alloy N06625 was established by induc-tively coupled plasma mass spectrometry(ICP-MS).The results showed that the correlation coefficients of calibration curves of elements were all higher than 0.999 0.The limits of detection and limits of quantifica-tion were 0.004 5-0.38 μg/g and 0.015-1.28 μg/g,respectively.The samples of nickel-based alloy N06625 were determined according to the proposed method.The relative standard deviations(RSD,n=11)of de-termination results of 5 elements were between 0.87％and 9.9％,and the recoveries were between 92％and 107％.The proposed method was applied for determination of trace Se,Ce,Zr,Ta and Te in sample of nickel-based alloy N06625.The results of Se and Te were basically consistent with those obtained by hydride generation atomic fluorescence spectrometry(HG-AFS),and the results of Ce and Zr were basical-ly consistent with those obtained by inductively coupled plasma atomic emission spectrometry(ICP-AES).
inductively coupled plasma mass spectrometry(ICP-MS)nickel-based alloyseleniumceriumzirconiumtantalumtellurium
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