Determination of Gallium Isotopic Compositions in Reference Materials
Determination of Gallium Isotopic Compositions in Reference Materials
复制标题
标准物质中镓同位素组成的测定
DOI：
10.1111/ggr.12294
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发表时间：
2019
影响因子：
3.8
通讯作者：
Yong‐sheng Liu
中科院分区：
文献类型：
--
作者：
Lan‐ping Feng;Lian Zhou;Jinhua Liu;Zhao‐chu Hu;Yong‐sheng Liu
在过去的几年里，对低温和高温环境中镓（Ga）稳定同位素分馏研究的兴趣显着增加。然而，一个统一的参考材料（RM）仍然缺乏Ga同位素研究界，这阻碍了不同群体之间的实验室间比较。因此，用于实验室间比较的Ga同位素标准物质的认证是高度优先的。在这项研究中，镓同位素比值的10个地质RM，包括硅酸盐，页岩和铁锰结核，和两个纯镓RM，包括NIST SRM 994和NIST SRM 3119 a的三个不同的团体报告，由MC‐ICP‐MS测定数据。地质RM的样品基质通过双柱分离方法分别使用AG MP-1 M和AG 50-X8树脂分离，并且对于所有地质RM获得> 99%的Ga定量回收率。通过组合校准品-样本交叉进样和内部标准化模型校正仪器质量偏倚。通过分析合成溶液对拟定方法进行验证。将所有地质RM的δ 71 Ga数据归一化为单个Ga RM后，我们的研究结果与以前报道的结果一致。
The interest in the study of gallium (Ga) stable isotope fractionation in low‐ and high‐temperature environments has increased significantly in the last few years. However, a unified reference material (RM) is still lacking for the Ga isotope research community, which hinders interlaboratory comparison between different groups. Consequently, certification of Ga isotopic reference materials for interlaboratory comparison is of high priority. In this study, Ga isotope ratio data for ten geological RMs including silicates, shales and ferromanganese nodules, and two pure Ga RMs including NIST SRM 994 and NIST SRM 3119a reported by three different groups, were determined by MC‐ICP‐MS. Sample matrices of geological RMs were separated by a two‐column separation method with the use of AG MP‐1M and AG 50‐X8 resin, separately, and quantitative recoveries of > 99% Ga were obtained for all geological RMs. Instrumental mass bias was corrected by the combined calibrator‐sample bracketing and internal normalisation model. Validation of the proposed method was performed by analysing synthetic solutions. After normalisation of all available δ71Ga data of geological RMs to a single Ga RM, results obtained in our study are in agreement with previously reported results.