Precise determination of stable W isotopic compositions of seawater with Fe co-precipitation and double spike MC-ICP-MS
文献类型：期刊论文
| 作者 | Liu, Mengnan2; Li, Tao3; Yang, Ruiyu2; Liu, Shu2; Hong, Qingquan1; Chen, Tianyu1; Li, Gaojun2 |
| 刊名 | JOURNAL OF ANALYTICAL ATOMIC SPECTROMETRY
 |
| 出版日期 | 2025-05-07 |
| 卷号 | 40期号:5页码:1169-1175 |
| ISSN号 | 0267-9477 |
| DOI | 10.1039/d5ja00091b |
| 通讯作者 | Li, Tao(taoli@nigpas.ac.cn) |
| 英文摘要 | Precise determination of the stable isotopic composition of W in seawater (delta 186/184Wsw) is crucial for better constraining the oceanic W cycle, enabling robust reconstructions of redox conditions of the ocean in the past. However, due to the extremely low concentration of W in seawater (similar to 0.041 to similar to 0.067 nM), accurately measuring delta 186/184Wsw remains a technical challenge. Previous studies have developed methods using chelating resins for pre-concentrating W from seawater, but these approaches often suffer from lengthy procedures and incomplete W recovery and also require large sample volumes. In this technical note, we present a novel method that combines iron (Fe) co-precipitation with anion exchange chromatography to isolate W. This approach efficiently removes most of the matrix elements and generally achieves a recovery rate higher than 70%. The calibrated 183W-186W double spike was employed to correct for mass-dependent isotopic fractionation during Fe co-precipitation, chemical purification, and subsequent mass spectrometric analysis. Applying this method to seawater samples from the North Pacific open ocean, we obtained an average delta 186/184Wsw value of 0.54 +/- 0.06 parts per thousand (2SD, n = 4), which is consistent with previous findings and supports the isotopic homogeneity of W in the open ocean. Therefore, the combination of Fe co-precipitation and double spike provides a more efficient way to determine the W isotopic compositions in seawater with only a trace amount of W. |
| WOS关键词 | TUNGSTEN ; ADSORPTION ; MOLYBDENUM ; DIFFERENTIATION ; BEHAVIOR ; MANTLE |
| 资助项目 | National Natural Science Foundation of China[42325302] ; National Natural Science Foundation of China[BK20240215] ; Natural Science Foundation of Jiangsu Province ; State Key Laboratory of Palaeobiology and Stratigraphy |
| WOS研究方向 | Chemistry ; Spectroscopy |
| 语种 | 英语 |
| WOS记录号 | WOS:001471771500001 |
| 出版者 | ROYAL SOC CHEMISTRY |
| 资助机构 | National Natural Science Foundation of China ; National Natural Science Foundation of China ; Natural Science Foundation of Jiangsu Province ; State Key Laboratory of Palaeobiology and Stratigraphy |
| 源URL | [http://ir.nigpas.ac.cn/handle/332004/45071]  |
| 专题 | 中国科学院南京地质古生物研究所 |
| 通讯作者 | Li, Tao |
| 作者单位 | 1.Nanjing Univ, Sch Earth Sci & Engn, State Key Lab Mineral Deposit Res, Nanjing 210023, Peoples R China 2.Nanjing Univ, Sch Earth Sci & Engn, MOE Key Lab Surficial Geochem, Nanjing 210023, Peoples R China 3.Chinese Acad Sci, State Key Lab Palaeobiol & Stratig, Nanjing Inst Geol & Palaeontol, Nanjing 210008, Peoples R China |
| 推荐引用方式 GB/T 7714 | Liu, Mengnan,Li, Tao,Yang, Ruiyu,et al. Precise determination of stable W isotopic compositions of seawater with Fe co-precipitation and double spike MC-ICP-MS[J]. JOURNAL OF ANALYTICAL ATOMIC SPECTROMETRY,2025,40(5):1169-1175. |
| APA | Liu, Mengnan.,Li, Tao.,Yang, Ruiyu.,Liu, Shu.,Hong, Qingquan.,...&Li, Gaojun.(2025).Precise determination of stable W isotopic compositions of seawater with Fe co-precipitation and double spike MC-ICP-MS.JOURNAL OF ANALYTICAL ATOMIC SPECTROMETRY,40(5),1169-1175. |
| MLA | Liu, Mengnan,et al."Precise determination of stable W isotopic compositions of seawater with Fe co-precipitation and double spike MC-ICP-MS".JOURNAL OF ANALYTICAL ATOMIC SPECTROMETRY 40.5(2025):1169-1175. |
入库方式： OAI收割
来源：南京地质古生物研究所
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