A Novel Alkali Precipitation Method for Tungsten Separation and High-Precision Isotopic Measurement in Geological Samples
文献类型：期刊论文
| 作者 | Qin, Zheng3; Wang, Cuiping3; Zhou, Wenjun3; Liu, Huanxin3; Gao, Ruohan2; Li, Jie1 ; Liu, Jingao3
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| 刊名 | GEOSTANDARDS AND GEOANALYTICAL RESEARCH
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| 出版日期 | 2023 |
| 卷号 | 47期号:4页码:811-819 |
| 关键词 | PLASMA-MASS SPECTROMETRY ELEMENTS MANTLE |
| ISSN号 | 1639-4488 |
| DOI | 10.1111/ggr.12521 |
| 英文摘要 | Tungsten (W) isotopes are useful tools in geological and cosmochemical research, but the chemical separation of W is cumbersome for high-precision measurement. Here, a novel alkali (sodium hydroxide, NaOH) precipitation method for separation and purification of W in geological samples is described, which simplifies the chemical procedure. The amphoteric character of W is exploited to separate it from most matrix elements in alkaline conditions. Subsequently, TEVA resin was applied to further purify W for measurements using a multi-collector inductively coupled plasma-mass spectrometer. Importantly, the introduction of a certain amount of Na in the W analyte can increase the signal intensity by approximately 1.6 times, which may be caused by Coulomb fission. Such Na-triggered signal enhancement reduces the test portion mass required for analysis. Our results show that the Alfa Aesar W standard solution and geological reference materials JB-3, BCR-2 and BHVO-2 yield 182W/184W ratios consistent with previously reported values within uncertainty. Repeated measurement of the Alfa Aesar W standard solution shows that the intermediate precision of 182W/184W was better than 5 ppm (2s), which is sufficient to identify subtle 182W isotope variations in terrestrial and extra-terrestrial samples. Above all, the alkali precipitation method in this study optimises the experimental process and mass spectrometric analysis. ? 2023 The Authors. Geostandards and Geoanalytical Research ? 2023 International Association of Geoanalysts. |
| WOS研究方向 | Geochemistry & Geophysics |
| 语种 | 英语 |
| WOS记录号 | WOS:001046402600001 |
| 源URL | [http://ir.gig.ac.cn/handle/344008/80279]  |
| 专题 | 同位素地球化学国家重点实验室 |
| 作者单位 | 1.State Key Laboratory of Isotope Geochemistry, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou; 510640, China 2.School of Earth Science and Resources, China University of Geosciences (Beijing), Beijing; 100083, China 3.State Key Laboratory of Geological Processes and Mineral Resources, China University of Geosciences, Beijing; 100083, China |
| 推荐引用方式 GB/T 7714 | Qin, Zheng,Wang, Cuiping,Zhou, Wenjun,et al. A Novel Alkali Precipitation Method for Tungsten Separation and High-Precision Isotopic Measurement in Geological Samples[J]. GEOSTANDARDS AND GEOANALYTICAL RESEARCH,2023,47(4):811-819. |
| APA | Qin, Zheng.,Wang, Cuiping.,Zhou, Wenjun.,Liu, Huanxin.,Gao, Ruohan.,...&Liu, Jingao.(2023).A Novel Alkali Precipitation Method for Tungsten Separation and High-Precision Isotopic Measurement in Geological Samples.GEOSTANDARDS AND GEOANALYTICAL RESEARCH,47(4),811-819. |
| MLA | Qin, Zheng,et al."A Novel Alkali Precipitation Method for Tungsten Separation and High-Precision Isotopic Measurement in Geological Samples".GEOSTANDARDS AND GEOANALYTICAL RESEARCH 47.4(2023):811-819. |
入库方式： OAI收割
来源：广州地球化学研究所
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