High-precision direct determination of the 87Sr/86Sr isotope ratio of bottled Sr-rich natural mineral drinking water using multiple collector inductively coupled plasma mass spectrometry

Yue-Heng Yang, Fu-Yuan Wu, Lie-Wen Xie, Jin-Hui Yang, Yan-Bin Zhang

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36 Citations (Scopus)

Abstract

We describe a precise and accurate method for the direct determination of the 87Sr/86Sr isotope ratio of bottled Sr-rich natural mineral drinking water using multiple collector inductively coupled plasma mass spectrometry (MC-ICP-MS). The method is validated by the comparative analysis of the same water with and without cation-exchange resin purification. The work indicates that isobarically interfering elements can be corrected for when 87Rb/86Sr < 0.05 (Rb/Sr < 0.015), and that the matrix elements (Ca, Mg, K and Na) have no significant effect on the accuracy of the Sr isotope data. The method is simple, rapid, eliminates sample preparation time, and avoids potential contamination during complicated sample-preparation procedures. Therefore, the high sample throughput inherent to the MC-ICP-MS can be fully exploited.

Original languageEnglish
Pages (from-to)656-660
Number of pages5
JournalSpectrochimica Acta - Part B Atomic Spectroscopy
Volume66
Issue number8
DOIs
Publication statusPublished - Aug 2011
Externally publishedYes

Keywords

  • ⁸⁷Sr/⁸⁶Sr isotope ratio
  • bottled Sr-rich natural mineral drinking water
  • direct determination
  • multiple collector ICP-MS

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