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Quantifying the impact of recovery during chromatographic purification on the accuracy of lithium isotopic determination by multi-collector inductively coupled plasma mass spectrometry
Gou, Long-Fei1,2; Liu, Chun-Yao1,2; Deng, Li1; Jin, Zhangdong1,3
通讯作者Jin, Zhangdong(zhdjin@ieecas.cn)
2020-02-15
发表期刊RAPID COMMUNICATIONS IN MASS SPECTROMETRY
ISSN0951-4198
卷号34期号:3页码:10
摘要Rationale Lithium (Li) isotopes have increasingly been applied as tracers in Earth and planetary sciences and their effectiveness relies upon accurate and precise Li isotopic data. Nowadays, multi-collector inductively coupled plasma mass spectrometry (MC-ICP-MS) combined with chromatographic purification is the most common strategy for obtaining Li isotopic ratios in natural samples, with a long-term internal precision better than 0.3 parts per thousand in most laboratories. However, there is a large discrepancy in the Li isotopic compositions of the same reference materials determined by MC-ICP-MS among international laboratories (e.g. ca 3.5 parts per thousand difference for measurements of homogeneous seawater), which has been attributed to insufficient recovery of Li during chromatographic purification. Despite this recognition, the exact impact of Li recovery during purification on Li isotopic determinations by MC-ICP-MS has never been quantified. Methode employed anormal distribution function to model Li elution curves and quantified the Li isotopic fractionation resulting from Li recovery during chromatographic purification. Furthermore, we compared the calculated and measured relative recovery (R) with the Li isotopic ratios determined by ICP-MS to validate our theoretical calculation. Results The theoretical calculations showed that R should be higher than 99.8% in order to avoid observable Li isotopic fractionation during chromatographic purification at IEECAS. This idea is further supported by the better long-term external precisions for data with R >= 99.8% compared with previous values of 99.5% <= R < 99.8%. Our results indicated that the large differences in the reported Li isotopic ratios for homogeneous seawater among international laboratories are probably attributable to Li isotopic fractionation occurring during ion exchange chromatography. Conclusions Our theoretical calculation via R is the first quantitative and convenient approach for monitoring Li isotopic fractionation during sample purification, ensuring that R >= 99.8% can avoid observable Li isotopic fractionation during purification, which will improve the accuracy of Li isotopic measurements by MC-ICP-MS and the comparability among laboratories.
DOI10.1002/rcm.8577
关键词[WOS]MC-ICP-MS ; PRECISE DETERMINATION ; RATIO MEASUREMENT ; ATOMIC WEIGHTS ; FRACTIONATION ; ROCK ; MANTLE ; LI ; SEAWATER ; SAMPLES
收录类别SCI ; SCI
语种英语
资助项目National Natural Science Foundation of China[41773149]
WOS研究方向Biochemistry & Molecular Biology ; Chemistry ; Spectroscopy
项目资助者National Natural Science Foundation of China
WOS类目Biochemical Research Methods ; Chemistry, Analytical ; Spectroscopy
WOS记录号WOS:000507916100005
出版者WILEY
引用统计
被引频次:6[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.ieecas.cn/handle/361006/13154
专题加速器质谱中心
通讯作者Jin, Zhangdong
作者单位1.Chinese Acad Sci, Inst Earth Environm, SKLLQG, Xian 710061, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
3.Xi An Jiao Tong Univ, Inst Global Environm Change, Xian 710049, Peoples R China
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Gou, Long-Fei,Liu, Chun-Yao,Deng, Li,et al. Quantifying the impact of recovery during chromatographic purification on the accuracy of lithium isotopic determination by multi-collector inductively coupled plasma mass spectrometry[J]. RAPID COMMUNICATIONS IN MASS SPECTROMETRY,2020,34(3):10.
APA Gou, Long-Fei,Liu, Chun-Yao,Deng, Li,&Jin, Zhangdong.(2020).Quantifying the impact of recovery during chromatographic purification on the accuracy of lithium isotopic determination by multi-collector inductively coupled plasma mass spectrometry.RAPID COMMUNICATIONS IN MASS SPECTROMETRY,34(3),10.
MLA Gou, Long-Fei,et al."Quantifying the impact of recovery during chromatographic purification on the accuracy of lithium isotopic determination by multi-collector inductively coupled plasma mass spectrometry".RAPID COMMUNICATIONS IN MASS SPECTROMETRY 34.3(2020):10.
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