New Methods for the Chemical Isolation and Stable Isotope Measurement of Multiple Transition Metals, with Application to the Earth Sciences,Geostandards and Geoanalytical Research

当前位置： X-MOL 学术 › Geostand. Geoanal. Res. › 论文详情

Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)

New Methods for the Chemical Isolation and Stable Isotope Measurement of Multiple Transition Metals, with Application to the Earth Sciences
Geostandards and Geoanalytical Research ( IF 2.7 ) Pub Date : 2021-07-10 , DOI: 10.1111/ggr.12402
Mingzhao Sun ₁ , Corey Archer ₁ , Derek Vance ₁

Affiliation

Rapid advances in multi-collector inductively coupled plasma-mass spectrometry have made the routine, precise and accurate measurement of metal stable isotope ratios feasible, providing an opportunity to investigate past and present geochemical processes using transition metal abundances, abundance ratios and stable isotope compositions. Many studies have stressed the matrix of different controls on different metals and highlight the potential utility of studies of multiple metals on the same samples. Here we describe a new, multi-step chemical separation procedure that allows robust, and with blank contamination-free, measurements of the isotope systems of the transition metals Mo, Cu, Fe, Zn and Ni at high precision from a single sample aliquot and from a range of sample types. We test the approach via the isotopic analysis of four USGS rock reference materials: two basalts (BCR-2, BHVO-2) and two Fe-Mn nodules (Nod-A1 and Nod-P1) as well as a shale (SGR-1). The good ‘reproducibility’, and the agreement between measured values and reference values where available, demonstrates the validity and efficacy of our multi-step protocol. We also discuss in detail the key requirements of the approach, and the potential pitfalls that are encountered.

中文翻译：

多种过渡金属的化学分离和稳定同位素测量的新方法及其在地球科学中的应用

多收集器电感耦合等离子体质谱法的快速发展使金属稳定同位素比的常规、精确和准确测量成为可能，为使用过渡金属丰度、丰度比和稳定同位素组成研究过去和现在的地球化学过程提供了机会。许多研究强调了对不同金属的不同控制矩阵，并强调了对同一样品进行多种金属研究的潜在效用。在这里，我们描述了一种新的多步骤化学分离程序，该程序允许对单个样品等分试样中的过渡金属 Mo、Cu、Fe、Zn 和 Ni 的同位素系统进行稳健且无空白污染的测量，并且来自一系列样本类型。我们通过对四种 USGS 岩石参考材料的同位素分析来测试该方法：两种玄武岩（BCR-2、BHVO-2）和两种铁锰结核（Nod-A1 和 Nod-P1）以及页岩（SGR-1 ）。良好的“再现性”以及测量值和可用参考值之间的一致性证明了我们的多步骤协议的有效性和有效性。我们还详细讨论了该方法的关键要求，以及遇到的潜在陷阱。

更新日期：2021-07-10

点击分享查看原文

点击收藏

阅读更多本刊最新论文