岩矿测试2012，Vol.31Issue(2)：253-257,5.
电感耦合等离子体质谱法测定地质样品中铜锌铕钆铽的干扰及校正
Interference Correction in Determination of Cu, Zn, Eu, Gd, Tb in Geological Samples by Inductively Coupled Plasma-Mass Spectrometry
摘要
Abstract
Since Inductively Coupled Plasma-Mass Spectrometry (ICP-MS) detection is not in a closed vacuum system, ions generated from gas, water and acid may enter the detection system in the test procedures, resulting in interference, which affects accurate analysis for trace elements. Geological samples were decomposed by pressurized acid digestion of HF-HNO3, and Cu, Zn, Eu, Gd and Tb were simultaneously determined by ICP-MS. The instrument operating parameters were optimized and the interferences from the coexisting elements of Ti, Ba, Ce, Pr, Nd for the determination of Cu, Zn, Eu, Gd, Tb were studied. The interference correction of oxide interferences for the elements Ti, Ba, Ce, Pr and Nd was performed with interference coefficients by mathematical method, which improved the accuracy for Cu, Zn, Eu, Gd, Tb determination in geological samples. Interference coefficients of Cu, Zn, Eu, Gd and Tb were calibrated by determining similar concentrations of the interference elements Ti, Ba, Ce, Pr, Nd. The detection limits (10SD) for Cu, Zn, Eu, Gd and Tb were 0. 47, 0. 82, 0.002, 0. 004 and 0. 002 p,g/g, respectively. Both the accuracy and precision of the method were validated by analyzing standard reference materials GBW 07104, GBW 07105, GBW 07123, GBW 07303, GBW 07311, GBW 07402 and GBW07404 with RSD (ra = 12) less than5.0% and RE (n = 12) less than5.0%. The results were in good agreement with the certified values of the national standard materials of rock, soil and stream sediments. The method has been successfully used in practice for Cu, Zn, Eu, Gd and Tb determination in geological samples.关键词
地质样品/铜/锌/铕/钆/铽/电感耦合等离子体质谱法/干扰校正Key words
geological samples/ Cu/ Zn/ Eu/ Gd/ Tb/ inductively coupled plasma-mass spectrometry/ interference correction分类
化学化工引用本文复制引用
张保科,王蕾,马生凤,温宏利,巩爱华..电感耦合等离子体质谱法测定地质样品中铜锌铕钆铽的干扰及校正[J].岩矿测试,2012,31(2):253-257,5.基金项目
国家地质实验测试中心基本科研业务费项目(121235068101842) （121235068101842）
中国地质大调查项目(1212011120272) （1212011120272）
