期刊
SPECTROCHIMICA ACTA PART B-ATOMIC SPECTROSCOPY
卷 66, 期 8, 页码 656-660出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.sab.2011.07.004
关键词
Sr-87/Sr-86 isotope ratio; Bottled Sr-rich natural mineral drinking water; Direct determination; Multiple collector ICP-MS
类别
资金
- National Natural Science Foundation of China
- Institute of Geology and Geophysics, Chinese Academy of Sciences [41073009, 40773008, ZC0903]
We describe a precise and accurate method for the direct determination of the Sr-87/Sr-86 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 Rb-87/Sr-86 < 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. (C) 2011 Elsevier B.V. All rights reserved.
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