High-precision and high-accuracy magnesium isotope analysis on multiple-collector inductively coupled plasma mass spectrometry using a critical mixture double spike technique
A new procedure has been developed for high precision and high accuracy Mg isotope analysis on multiple-collector inductively coupled plasma mass spectrometry using a critical mixture double spike technique. Errors arising from improper preparation of the critical double spike solutions are able to...
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| Format: | Article |
| Language: | English |
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Elsevier
2022-09-01
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| Series: | Solid Earth Sciences |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2451912X22000174 |
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| author | Yongsheng He Ai-Ying Sun Yin-Chu Zhang Ru-Yi Yang Shan Ke Yang Wang Fang-Zhen Teng |
| author_facet | Yongsheng He Ai-Ying Sun Yin-Chu Zhang Ru-Yi Yang Shan Ke Yang Wang Fang-Zhen Teng |
| author_sort | Yongsheng He |
| collection | DOAJ |
| description | A new procedure has been developed for high precision and high accuracy Mg isotope analysis on multiple-collector inductively coupled plasma mass spectrometry using a critical mixture double spike technique. Errors arising from improper preparation of the critical double spike solutions are able to be corrected against the regression on a set of over- and under-spiked standards. Accuracy is ensured by correcting mass bias offset based on Monte Carlo calculations. Doping experiments indicate that the double spike method is robust to non-spectrum matrix effects. A long-term precision and accuracy of ±0.03‰ (2SD) was demonstrated for δ26Mg by replicate analyses of well-characterized in-house pure Mg solutions and synthetic samples passed through the column chemistry, provided that each sample was measured four times. The robustness of the method was further assessed by replicate analyses of fifteen geological reference materials ranging from peridotite, basalt, granodiorite, carbonatite to seawater. Rock standards yielded consistently higher δ26Mg by 0.076 ± 0.052‰ (2SD, N = 12) compared to data previously reported by standard-sample-bracketing from the same lab. This discrepancy might result from the difficulty in matching the matrices of natural samples exactly the same to the bracketing standards, even after purification, suggesting a careful evaluation on residual matrix effect for the standard-sampling-bracketing method. Our new data for geological reference materials serve as a reference for quality assessment and inter-laboratory comparison in future studies. |
| first_indexed | 2024-04-12T23:29:04Z |
| format | Article |
| id | doaj.art-24fbff6492f14a24a7c464152d60f752 |
| institution | Directory Open Access Journal |
| issn | 2451-912X |
| language | English |
| last_indexed | 2024-04-12T23:29:04Z |
| publishDate | 2022-09-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Solid Earth Sciences |
| spelling | doaj.art-24fbff6492f14a24a7c464152d60f7522022-12-22T03:12:20ZengElsevierSolid Earth Sciences2451-912X2022-09-0173188199High-precision and high-accuracy magnesium isotope analysis on multiple-collector inductively coupled plasma mass spectrometry using a critical mixture double spike techniqueYongsheng He0Ai-Ying Sun1Yin-Chu Zhang2Ru-Yi Yang3Shan Ke4Yang Wang5Fang-Zhen Teng6State Key Laboratory of Geological Processes and Mineral Resources, China University of Geosciences, Beijing 100083, China; Corresponding author.State Key Laboratory of Geological Processes and Mineral Resources, China University of Geosciences, Beijing 100083, ChinaState Key Laboratory of Geological Processes and Mineral Resources, China University of Geosciences, Beijing 100083, ChinaState Key Laboratory of Geological Processes and Mineral Resources, China University of Geosciences, Beijing 100083, ChinaState Key Laboratory of Geological Processes and Mineral Resources, China University of Geosciences, Beijing 100083, ChinaState Key Laboratory of Geological Processes and Mineral Resources, China University of Geosciences, Beijing 100083, ChinaIsotope Laboratory, Department of Earth and Space Sciences, University of Washington, Seattle, WA, 98195, USAA new procedure has been developed for high precision and high accuracy Mg isotope analysis on multiple-collector inductively coupled plasma mass spectrometry using a critical mixture double spike technique. Errors arising from improper preparation of the critical double spike solutions are able to be corrected against the regression on a set of over- and under-spiked standards. Accuracy is ensured by correcting mass bias offset based on Monte Carlo calculations. Doping experiments indicate that the double spike method is robust to non-spectrum matrix effects. A long-term precision and accuracy of ±0.03‰ (2SD) was demonstrated for δ26Mg by replicate analyses of well-characterized in-house pure Mg solutions and synthetic samples passed through the column chemistry, provided that each sample was measured four times. The robustness of the method was further assessed by replicate analyses of fifteen geological reference materials ranging from peridotite, basalt, granodiorite, carbonatite to seawater. Rock standards yielded consistently higher δ26Mg by 0.076 ± 0.052‰ (2SD, N = 12) compared to data previously reported by standard-sample-bracketing from the same lab. This discrepancy might result from the difficulty in matching the matrices of natural samples exactly the same to the bracketing standards, even after purification, suggesting a careful evaluation on residual matrix effect for the standard-sampling-bracketing method. Our new data for geological reference materials serve as a reference for quality assessment and inter-laboratory comparison in future studies.http://www.sciencedirect.com/science/article/pii/S2451912X22000174High-precisionHigh-accuracyMg isotope analysesDouble spike |
| spellingShingle | Yongsheng He Ai-Ying Sun Yin-Chu Zhang Ru-Yi Yang Shan Ke Yang Wang Fang-Zhen Teng High-precision and high-accuracy magnesium isotope analysis on multiple-collector inductively coupled plasma mass spectrometry using a critical mixture double spike technique Solid Earth Sciences High-precision High-accuracy Mg isotope analyses Double spike |
| title | High-precision and high-accuracy magnesium isotope analysis on multiple-collector inductively coupled plasma mass spectrometry using a critical mixture double spike technique |
| title_full | High-precision and high-accuracy magnesium isotope analysis on multiple-collector inductively coupled plasma mass spectrometry using a critical mixture double spike technique |
| title_fullStr | High-precision and high-accuracy magnesium isotope analysis on multiple-collector inductively coupled plasma mass spectrometry using a critical mixture double spike technique |
| title_full_unstemmed | High-precision and high-accuracy magnesium isotope analysis on multiple-collector inductively coupled plasma mass spectrometry using a critical mixture double spike technique |
| title_short | High-precision and high-accuracy magnesium isotope analysis on multiple-collector inductively coupled plasma mass spectrometry using a critical mixture double spike technique |
| title_sort | high precision and high accuracy magnesium isotope analysis on multiple collector inductively coupled plasma mass spectrometry using a critical mixture double spike technique |
| topic | High-precision High-accuracy Mg isotope analyses Double spike |
| url | http://www.sciencedirect.com/science/article/pii/S2451912X22000174 |
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