Iron Isotopic Measurement Using Large-Geometry High-Resolution Multi-Collector Inductively Coupled Plasma Mass Spectrometer

IF 3.4 2区化学 Q1 SPECTROSCOPY

Atomic Spectroscopy Pub Date : 2022-06-30 DOI:10.46770/as.2022.111

Ming Li

{"title":"Iron Isotopic Measurement Using Large-Geometry High-Resolution Multi-Collector Inductively Coupled Plasma Mass Spectrometer","authors":"Ming Li","doi":"10.46770/as.2022.111","DOIUrl":null,"url":null,"abstract":": High-precision and accurate Fe isotopic analyses are essential for various geological processes. In this study, Fe isotopic measurements were optimized on a large-geometry, high-resolution Nu Plasma 1700 MC-ICP-MS instrument, which can distinguish Ar-related interferences completely as opposed to other general-sized MC-ICP-MS instruments. Under the conditions of high mass resolution, complete separation of Ar-related interference can be achieved. We evaluated the type and intensity of all Ar-related interferences. The effects of the acid molarity, concentration mismatch, residual HCl, and matrix elements were also evaluated. The results demonstrate that the molarity of the acid, residual HCl, and Cr significantly affected the precision of the Fe isotopic measurements. Fe was purified by one-step column anion-exchange separation using the anion resin AG-MP-1M. The long-term external precisions of δ 56 Fe and δ 57 Fe were greater than ± 0.03‰ (2SD) and ± 0.06‰ (2SD), respectively. The Fe isotopic compositions of the five geological reference materials measured in this study agreed with previously published data, within uncertainties.","PeriodicalId":8642,"journal":{"name":"Atomic Spectroscopy","volume":" ","pages":""},"PeriodicalIF":3.4000,"publicationDate":"2022-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"2","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Atomic Spectroscopy","FirstCategoryId":"92","ListUrlMain":"https://doi.org/10.46770/as.2022.111","RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"SPECTROSCOPY","Score":null,"Total":0}

引用次数: 2

Abstract

: High-precision and accurate Fe isotopic analyses are essential for various geological processes. In this study, Fe isotopic measurements were optimized on a large-geometry, high-resolution Nu Plasma 1700 MC-ICP-MS instrument, which can distinguish Ar-related interferences completely as opposed to other general-sized MC-ICP-MS instruments. Under the conditions of high mass resolution, complete separation of Ar-related interference can be achieved. We evaluated the type and intensity of all Ar-related interferences. The effects of the acid molarity, concentration mismatch, residual HCl, and matrix elements were also evaluated. The results demonstrate that the molarity of the acid, residual HCl, and Cr significantly affected the precision of the Fe isotopic measurements. Fe was purified by one-step column anion-exchange separation using the anion resin AG-MP-1M. The long-term external precisions of δ 56 Fe and δ 57 Fe were greater than ± 0.03‰ (2SD) and ± 0.06‰ (2SD), respectively. The Fe isotopic compositions of the five geological reference materials measured in this study agreed with previously published data, within uncertainties.

查看原文本刊更多论文

用大几何高分辨率多收集器电感耦合等离子体质谱仪测量铁同位素

：高精度和准确的铁同位素分析对各种地质过程至关重要。在这项研究中，Fe同位素测量是在一个大型几何结构、高分辨率Nu Plasma 1700 MC-ICP-MS仪器上进行优化的，与其他通用尺寸的MC-ICP-M仪器相比，该仪器可以完全区分与Ar相关的干扰。在高质量分辨率的条件下，可以实现Ar相关干扰的完全分离。我们评估了所有Ar相关干扰的类型和强度。还评估了酸摩尔浓度、浓度失配、残留HCl和基质元素的影响。结果表明，酸、残留HCl和Cr的摩尔浓度显著影响Fe同位素测量的精度。采用阴离子树脂AG-MP-1M，采用一步柱阴离子交换法对铁进行纯化。δ56Fe和δ57Fe的长期外精度分别大于±0.03‰（2SD）和±0.06‰（2SD）。本研究中测量的五种地质参考物质的Fe同位素组成与之前公布的数据一致，但存在不确定性。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文求助全文

来源期刊

Atomic Spectroscopy 物理-光谱学

CiteScore

5.30

自引率

14.70%

发文量

审稿时长

4.5 months

期刊介绍： The ATOMIC SPECTROSCOPY is a peer-reviewed international journal started in 1962 by Dr. Walter Slavin and now is published by Atomic Spectroscopy Press Limited (ASPL). It is intended for the rapid publication of both original articles and review articles in the fields of AAS, AFS, ICP-OES, ICP-MS, GD-MS, TIMS, SIMS, AMS, LIBS, XRF and related techniques. Manuscripts dealing with (i) instrumentation & fundamentals, (ii) methodology development & applications, and (iii) standard reference materials (SRMs) development can be submitted for publication.