Quantifying the impact of recovery during chromatographic purification on the accuracy of lithium isotopic determination by multi-collector inductively coupled plasma mass spectrometry
文献类型：期刊论文
| 作者 | Gou, Long-Fei1,3; Liu, Chun-Yao1,3; Deng, Li3; Jin, Zhangdong2,3 |
| 刊名 | RAPID COMMUNICATIONS IN MASS SPECTROMETRY
 |
| 出版日期 | 2020-02-15 |
| 卷号 | 34期号:3页码:10 |
| ISSN号 | 0951-4198 |
| DOI | 10.1002/rcm.8577 |
| 通讯作者 | Jin, Zhangdong(zhdjin@ieecas.cn) |
| 英文摘要 | 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. |
| WOS关键词 | MC-ICP-MS ; PRECISE DETERMINATION ; RATIO MEASUREMENT ; ATOMIC WEIGHTS ; FRACTIONATION ; ROCK ; MANTLE ; LI ; SEAWATER ; SAMPLES |
| 资助项目 | National Natural Science Foundation of China[41773149] |
| WOS研究方向 | Biochemistry & Molecular Biology ; Chemistry ; Spectroscopy |
| 语种 | 英语 |
| WOS记录号 | WOS:000507916100005 |
| 出版者 | WILEY |
| 资助机构 | National Natural Science Foundation of China |
| 源URL | [http://ir.ieecas.cn/handle/361006/13153]  |
| 专题 | 地球环境研究所_加速器质谱中心 |
| 通讯作者 | Jin, Zhangdong |
| 作者单位 | 1.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 2.Xi An Jiao Tong Univ, Inst Global Environm Change, Xian 710049, Peoples R China 3.Chinese Acad Sci, Inst Earth Environm, SKLLQG, Xian 710061, Peoples R China |
| 推荐引用方式 GB/T 7714 | 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. |
入库方式： OAI收割
来源：地球环境研究所
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