Mass-independent fractionation during Mo isotope measurement by MC-ICP-MS: implications for application of the double spike technique
文献类型：期刊论文
| 作者 | Zhao, Yan3; Yang, Wubin1,2; Leng, Chengbiao3 |
| 刊名 | JOURNAL OF ANALYTICAL ATOMIC SPECTROMETRY
 |
| 出版日期 | 2023 |
| 卷号 | 38期号:4页码:785-791 |
| 关键词 | GEOLOGICAL SAMPLES ERROR PROPAGATION AMOUNT RATIOS MOLYBDENUM EQUATIONS PRECISE |
| ISSN号 | 0267-9477 |
| DOI | 10.1039/d2ja00427e |
| 英文摘要 | This study presents our new observation on mass-independent fractionation (MIF) during Mo isotope measurement by MC-ICP-MS and investigates its implication for the application of the double spike (DS) technique. A mixture of NIST SRM 3134 Mo solution with a calibrated 97Mo-100Mo DS (1 : 1) was prepared for measurements over ?15 h. The Mo isotopic data in this study show a good linear relationship in the scatter plots of ln(97/95Mo) vs. ln(98/95Mo), ln(97/95Mo) vs. ln(100/95Mo), and ln(98/95Mo) vs. ln(100/95Mo). Considering measurement errors on both vertical and horizontal axes, York linear regression was applied to linear fit. The slopes derived from the York linear regression are 1.33 ± 0.12 (2SE), 2.30 ± 0.20 (2SE), and 1.73 ± 0.14 (2SE), respectively. Given the error, the slopes are not exactly consistent with their theoretically expected values (1.49, 2.46, and 1.64) based on the assumption of mass-dependent fractionation (MDF). This study, for the first time, identifies MIF during Mo isotope measurement by MC-ICP-MS. DS calculation using theoretical mass fractionation factors shows that the analyzed NIST SRM 3134 Mo solution yielded δ98/95Mo values of 0.00 ± 0.04‰ (2SD, n = 17) relative to the originally calibrated NIST SRM 3134 Mo. However, using experimental mass fractionation factors calculated from the slopes of line relationships, there is a deviation of about 0.46‰ for δ98/95Mo. The results indicate that the calibrated isotope ratios of the standard and DS could not be the true values but approximate values for better matching with the MDF-based equations. After DS calculation using experimental and theoretical mass fractionation factors, respectively, an additional standard-sample bracketing (SSB) method was conducted. Both calculations gave identical and accurate δ98/95Mo values (0.00 ± 0.06‰), indicating that the SSB method is able to correct deviation from MIF during DS calculation. Accordingly, we proposed that an additional SSB method is recommended to acquire accurate isotope ratios during the application of the DS technique. This study highlights that researchers should pay attention to the possible existence of instrument-related MIF during isotope measurement. ? 2023 The Royal Society of Chemistry. |
| WOS研究方向 | Chemistry, Analytical ; Spectroscopy |
| 语种 | 英语 |
| WOS记录号 | WOS:000949291600001 |
| 源URL | [http://ir.gig.ac.cn/handle/344008/80299]  |
| 专题 | 中国科学院矿物学与成矿学重点实验室 |
| 作者单位 | 1.CAS Center for Excellence in Deep Earth Science, Guangzhou; 510640, China 2.Key Laboratory of Mineralogy and Metallogeny, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences/Guangdong Provincial Key Laboratory of Mineral Physics and Materials, Guangzhou; 510640, China 3.State Key Laboratory of Nuclear Resources and Environment, East China University of Technology, Nanchang; 330013, China |
| 推荐引用方式 GB/T 7714 | Zhao, Yan,Yang, Wubin,Leng, Chengbiao. Mass-independent fractionation during Mo isotope measurement by MC-ICP-MS: implications for application of the double spike technique[J]. JOURNAL OF ANALYTICAL ATOMIC SPECTROMETRY,2023,38(4):785-791. |
| APA | Zhao, Yan,Yang, Wubin,&Leng, Chengbiao.(2023).Mass-independent fractionation during Mo isotope measurement by MC-ICP-MS: implications for application of the double spike technique.JOURNAL OF ANALYTICAL ATOMIC SPECTROMETRY,38(4),785-791. |
| MLA | Zhao, Yan,et al."Mass-independent fractionation during Mo isotope measurement by MC-ICP-MS: implications for application of the double spike technique".JOURNAL OF ANALYTICAL ATOMIC SPECTROMETRY 38.4(2023):785-791. |
入库方式： OAI收割
来源：广州地球化学研究所
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