Determination of δ 44/40 Ca and δ 56/54 Fe in Geological Materials Combined with a Simplified Method for their Separation Using a Single TODGA Resin Column
Determination of δ 44/40 Ca and δ 56/54 Fe in Geological Materials Combined with a Simplified Method for their Separation Using a Single TODGA Resin Column
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结合使用单一 TODGA 树脂柱的简化分离方法测定地质材料中的 δ 44/40 Ca 和 δ 56/54 Fe
DOI：
10.1111/ggr.12350
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发表时间：
2020
影响因子：
3.8
通讯作者：
Shouqian Zhao
中科院分区：
文献类型：
--
作者：
Qiuyun Guan;Yali Sun;Richard M. Palin;Xiaoming Liu;Yajun An;Fang Liu;Shouqian Zhao
建立了多接收电感耦合等离子体质谱（MC-ICP-MS）和热电离质谱（TIMS）测定地质样品中δ44/40 Ca和δ56/54 Fe的方法，并采用TODGA树脂柱分离。用TODGA树脂分离地质样品，用1.5 mol l− 1HNO 3和2 mol l−1HCl分别洗脱Fe和Ca离子，用12 ml 6 mol l − 1HCl除去基体和干扰元素后，Fe和Ca的回收率分别为99.7 ± 0.4%（n= 3）和99.4 ± 0.6%（n= 3）。该程序通过参考材料AGV-2、BCR-2和BHVO-2进行了验证。其Fe和Ca同位素数据与文献值相当，证实了含有TODGA树脂的单柱可用于分离地质样品中的Fe和Ca，以测定其同位素比值，而不存在测量偏差。
A measurement procedure has been developed for the determination of δ44/40Ca and δ56/54Fe in geological samples by multi‐collector inductively coupled plasma‐mass spectrometry (MC‐ICP‐MS) and thermal ionisation mass spectrometry (TIMS), combined with a single TODGA resin column for their separation. Using the TODGA resin for separation of geological materials, Fe and Ca ions were eluted by using 8 ml of 1.5 mol l−1HNO3and 8 ml of 2 mol l−1HCl, respectively, and their recovery was 99.7 ± 0.4% (n= 3) for the former and 99.4 ± 0.6% (n= 3) for the latter after removal of matrix and interfering elements using 12 ml of 6 mol l−1HCl. This procedure was validated by the reference materials AGV‐2, BCR‐2 and BHVO‐2. Their Fe and Ca isotope data were comparable to their literature values, confirming a single column containing TODGA resin can be applied to the separation of Fe and Ca in geological samples for determination of their isotope ratios free of measurement bias.