岩矿测试2025，Vol.44Issue(2)：230-244,15.DOI:10.15898/j.ykcs.202407310165
利用高压离子色谱仪自动分离纯化地质样品中的锂
Automatic Purification of Li Isotopes from Geological Samples by High-Pressure Ion Chromatography
摘要
Abstract
High-quality purification of lithium(Li)is crucial in measuring 7Li/6Li ratios of whole rocks precisely by MC-ICP-MS.Many scholars have proposed traditional manual Li purification methods by cross-combining the types of eluents,types of resin,resin particle size,column tube size,and resin volume.However,the process is still cumbersome.In contrast,high-pressure ion chromatography(HP-IC)provides single-step separation,shorter durations,and online quantification;it is underutilized due to insufficient systematic research on its elution processes.Here,an automatic purification method of Li by HP-IC was established by optimizing IC parameters,laying a foundation for the wide application of IC in the field of isotope purification.The testing results of Li collections for four national geological standard samples indicate that the recovery rate exceeds 99.3%,and the blank measurement is lower than that of the traditional manual column method.The amount of separated Li also meets the demand of MC-ICP-MS for Li isotope analysis.The BRIEF REPORT is available for this paper at http://www.ykcs.ac.cn/en/article/doi/10.15898/j.ykcs.202407310165.关键词
Li同位素/高压离子色谱仪/阳离子色谱柱/酸耐受性/载荷能力/回收率Key words
Li isotope/high-pressure ion chromatography/cation ion chromatographic column/acid tolerance/sample-loading capacity/recovery rate分类
化学引用本文复制引用
杨旖旎,汪双双,魏小燕,李艳广,黎卫亮,靳梦琪,焦鑫..利用高压离子色谱仪自动分离纯化地质样品中的锂[J].岩矿测试,2025,44(2):230-244,15.基金项目
国家自然科学基金青年基金项目(41502036) （41502036）
