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
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
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DOI：
10.1016/j.sab.2011.07.004
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发表时间：
2011-08
期刊：
影响因子：
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通讯作者：
Yue-heng Yang;Fu-Yuan Wu;Liewen Xie;Jin-Hui Yang;Yanbin Zhang
中科院分区：
文献类型：
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作者：
Yue-heng Yang;Fu-Yuan Wu;Liewen Xie;Jin-Hui Yang;Yanbin Zhang
本文描述了一种用多收集器电感耦合等离子体质谱法（MC-ICP-MS）直接测定瓶装富锶天然矿物饮用水中87sr /86Sr同位素比值的精确方法。通过对同一水质进行阳离子交换树脂净化和不进行阳离子交换树脂净化的对比分析，验证了该方法的有效性。研究表明，当87rb /86Sr<0.05 （Rb/Sr<0.015）时，等压干扰元素可以进行校正，而基体元素（Ca、Mg、K和Na）对Sr同位素数据的精度没有显著影响。该方法简单，快速，消除了样品制备时间，并避免了复杂样品制备过程中的潜在污染。因此，MC-ICP-MS固有的高样品通量可以被充分利用。
We describe a precise and accurate method for the direct determination of the87Sr/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 when87Rb/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.