岩石矿物学杂志2024，Vol.43Issue(4)：1066-1072,7.DOI:10.20086/j.cnki.yskw.2024.0420
Cr-Ca化学分离方法研究
A study on methods for chemical separation of Cr form Ca
摘要
Abstract
The determination of Ca isotope ratios by multi-collector inductively coupled plasma mass spectrometry(MC-ICPMS)is sensitive to the matrix effect,especially that is generated by Cr elements,which leads to a devia-tion in Ca isotope compositions.Traditional methods using dilute HCl medium and strong acid cation exchange resin can achieve high-efficiency separation of most matrix elements and Ca,except Cr,where nearly 10％of Cr cannot be removed from Ca elution.For geological samples with high Cr,such as ultramafic rocks,the Cr/Ca ratio can be as high as 10.To achieve Ca isotope analysis of these special geological samples,here we studied the elution of Cr-Ca in concentrated HCl medium based on AG50W-X12(200-400 mesh)strong acid cation exchange resin.The results showed that efficient and rapid separation of Cr-Ca can be achieved when using 10 mol/L HCl,with a Cr separation rate＞99.9％.Moreover,this method can achieve efficient and rapid separation of elements such as K,Mg and Al from Ca.To test the validation of this method for Ca isotope analysis,δ44/42Ca of the Ca single-ele-ment solution after column separation was determined using MC-ICPMS,with the results consistent with the theoretical value within the analytical error.This indicates that this method is efficient for Ca element purification and valid for Ca isotope analysis for those high Cr samples.关键词
Ca同位素/Cr/化学分离/MC-ICPMSKey words
Ca isotopes/Cr/chemical separation/MC-ICPMS分类
化学化工引用本文复制引用
汪子辰,孙剑,李世珍,马健雄,李小伟..Cr-Ca化学分离方法研究[J].岩石矿物学杂志,2024,43(4):1066-1072,7.基金项目
国家重点研发计划(2019YFA0708604-01) （2019YFA0708604-01）
国家自然科学基金项目(42273051) （42273051）
中国地质科学院基本科研业务费(JKYQN202322,J2206) National Key Research and Development Program of China(2019YFA0708604-01) （JKYQN202322,J2206）
National Nat-ural Science Foundation of China(42273051) （42273051）
Basic Research Fund of the Chinese Academy of Geological Sci-ences(JKYQN202322,J2206) （JKYQN202322,J2206）
