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Precise δ29/28Si and δ30/28Si determination by high-resolution MC-ICP-MS.

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Title: Precise δ29/28Si and δ30/28Si determination by high-resolution MC-ICP-MS.
Authors: Liu, Mao-Rui1,2 (AUTHOR), Bai, Jiang-Hao1 (AUTHOR), Zhu, Guan-Hong1 (AUTHOR), Deng, Guang-Chao1,2 (AUTHOR), Wang, Qiang1,2 (AUTHOR), Wei, Gang-Jian1,2 (AUTHOR) gjwei@gig.ac.cn
Source: JAAS (Journal of Analytical Atomic Spectrometry). Feb2026, Vol. 41 Issue 2, p547-555. 9p.
Subjects: Silicon isotopes, Mass spectrometry, Isotopic analysis, Stable isotopes, Analytical geochemistry, Carbonate rocks
Abstract: The stable isotope compositions of silicon (Si) have the potential to trace various (bio)geochemical processes in Earth's systems. However, high-precision Si isotope analysis is challenging, and few studies have reported Si isotopes in low-Si rocks such as carbonate rocks, despite the intrinsic link between global silicon and carbon cycles. This scarcity is partly due to the lack of methods for Si purification and analysis of low-Si samples. In this study, we developed an efficient and convenient method for Si purification and precise determination of silicon isotopes in carbonate rocks using high resolution MC-ICP-MS. A series of conditions, such as volumes of alkali flux, acidity of the final digestion solution, loading amounts of Si, and loading volumes of eluents, were investigated to ascertain the optimal conditions for sample digestion and Si purification. The effects of acidity and concentration mismatch and presence of potential cationic matrix elements on Si isotope measurements were also evaluated. The robustness of this method was demonstrated by testing igneous rock reference materials and comparing with δ30Si values previously reported. Based on repeated measurements of Si isotope standards and reference materials, the long-term (over one year) intermediate precision was found to be better than ±0.09‰ (2SD, standard deviations). We additionally recommend seven reliable carbonate rock reference materials for future Si isotope ratio measurements. As such, the reported method is ideally suited for Si isotopic analysis of multiple types of geological samples. [ABSTRACT FROM AUTHOR]
Copyright of JAAS (Journal of Analytical Atomic Spectrometry) is the property of Royal Society of Chemistry and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Engineering Source
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Header DbId: egs
DbLabel: Engineering Source
An: 191482433
AccessLevel: 6
PubType: Academic Journal
PubTypeId: academicJournal
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  Label: Title
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  Data: Precise δ<superscript>29/28</superscript>Si and δ<superscript>30/28</superscript>Si determination by high-resolution MC-ICP-MS.
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  Data: <searchLink fieldCode="AR" term="%22Liu%2C+Mao-Rui%22">Liu, Mao-Rui</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Bai%2C+Jiang-Hao%22">Bai, Jiang-Hao</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Zhu%2C+Guan-Hong%22">Zhu, Guan-Hong</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Deng%2C+Guang-Chao%22">Deng, Guang-Chao</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Wang%2C+Qiang%22">Wang, Qiang</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Wei%2C+Gang-Jian%22">Wei, Gang-Jian</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<i> gjwei@gig.ac.cn</i>
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  Data: <searchLink fieldCode="JN" term="%22JAAS+%28Journal+of+Analytical+Atomic+Spectrometry%29%22">JAAS (Journal of Analytical Atomic Spectrometry)</searchLink>. Feb2026, Vol. 41 Issue 2, p547-555. 9p.
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  Data: <searchLink fieldCode="DE" term="%22Silicon+isotopes%22">Silicon isotopes</searchLink><br /><searchLink fieldCode="DE" term="%22Mass+spectrometry%22">Mass spectrometry</searchLink><br /><searchLink fieldCode="DE" term="%22Isotopic+analysis%22">Isotopic analysis</searchLink><br /><searchLink fieldCode="DE" term="%22Stable+isotopes%22">Stable isotopes</searchLink><br /><searchLink fieldCode="DE" term="%22Analytical+geochemistry%22">Analytical geochemistry</searchLink><br /><searchLink fieldCode="DE" term="%22Carbonate+rocks%22">Carbonate rocks</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: The stable isotope compositions of silicon (Si) have the potential to trace various (bio)geochemical processes in Earth's systems. However, high-precision Si isotope analysis is challenging, and few studies have reported Si isotopes in low-Si rocks such as carbonate rocks, despite the intrinsic link between global silicon and carbon cycles. This scarcity is partly due to the lack of methods for Si purification and analysis of low-Si samples. In this study, we developed an efficient and convenient method for Si purification and precise determination of silicon isotopes in carbonate rocks using high resolution MC-ICP-MS. A series of conditions, such as volumes of alkali flux, acidity of the final digestion solution, loading amounts of Si, and loading volumes of eluents, were investigated to ascertain the optimal conditions for sample digestion and Si purification. The effects of acidity and concentration mismatch and presence of potential cationic matrix elements on Si isotope measurements were also evaluated. The robustness of this method was demonstrated by testing igneous rock reference materials and comparing with δ30Si values previously reported. Based on repeated measurements of Si isotope standards and reference materials, the long-term (over one year) intermediate precision was found to be better than ±0.09‰ (2SD, standard deviations). We additionally recommend seven reliable carbonate rock reference materials for future Si isotope ratio measurements. As such, the reported method is ideally suited for Si isotopic analysis of multiple types of geological samples. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of JAAS (Journal of Analytical Atomic Spectrometry) is the property of Royal Society of Chemistry and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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RecordInfo BibRecord:
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      – Type: doi
        Value: 10.1039/d5ja00424a
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      – Code: eng
        Text: English
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      Pagination:
        PageCount: 9
        StartPage: 547
    Subjects:
      – SubjectFull: Silicon isotopes
        Type: general
      – SubjectFull: Mass spectrometry
        Type: general
      – SubjectFull: Isotopic analysis
        Type: general
      – SubjectFull: Stable isotopes
        Type: general
      – SubjectFull: Analytical geochemistry
        Type: general
      – SubjectFull: Carbonate rocks
        Type: general
    Titles:
      – TitleFull: Precise δ29/28Si and δ30/28Si determination by high-resolution MC-ICP-MS.
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            NameFull: Liu, Mao-Rui
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            NameFull: Bai, Jiang-Hao
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            NameFull: Zhu, Guan-Hong
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            NameFull: Deng, Guang-Chao
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            NameFull: Wang, Qiang
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            – D: 01
              M: 02
              Text: Feb2026
              Type: published
              Y: 2026
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              Value: 41
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