Trace element analysis of extraterrestrial metal samples by inductively coupled plasma mass spectrometry: the standard solutions and digesting acids
Trace element analysis of extraterrestrial metal samples by inductively coupled plasma mass spectrometry: the standard solutions and digesting acids
复制标题
电感耦合等离子体质谱法分析地外金属样品的痕量元素：标准溶液和消解酸
DOI：
10.1002/rcm.7460
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发表时间：
2016
影响因子：
2
通讯作者：
Lin Yangting
中科院分区：
文献类型：
--
作者：
Wang Guiqin;Wu Yangsiqian;Lin Yangting
地球外金属总量的近99%由Fe和Ni组成，但微量元素含量变化很大。在电感耦合等离子体质谱（ICP-MS）分析这些样品的解决方案中获得的准确度可以显着影响基质含量，多原子离子干扰，和外标solutionsMethodsAn ICP-MS仪器（X系列2）的浓度被用来确定30个标准溶液中的微量元素的浓度，和不同的基质含量。基于这些测量，确定基质效应。三个铁陨石分别溶解在王水和硝酸。由于在外部标准溶液中的基质含量的变化的偏差进行了评估和两种消解方法的铁陨石的分析结果进行了assessment.ResultsOur的结果显示出明显的偏差，由于不匹配的外标溶液中的基质含量。此外，发现用王水和HNO 3制备的样品溶液在某些元素的测量中存在差异，由于样品制备过程中氯化物损失和/或结论采用匹配基质含量的外标溶液，用HNO 3和水消解样品，建立了一种准确的地外金属样品的ICP-MS分析方法。regia。利用这项工作的数据，以前被归类为IAB‐ung的Mundrabilla铁陨石被重新归类为IAB‐MG。版权所有© 2016约翰威利父子有限公司.
RationaleNearly 99% of the total content of extraterrestrial metals is composed of Fe and Ni, but with greatly variable trace element contents. The accuracy obtained in the inductively coupled plasma mass spectrometry (ICP‐MS) analysis of solutions of these samples can be significantly influenced by matrix contents, polyatomic ion interference, and the concentrations of external standard solutions.MethodsAn ICP‐MS instrument (X Series 2) was used to determine 30 standard solutions with different concentrations of trace elements, and different matrix contents. Based on these measurements, the matrix effects were determined. Three iron meteorites were dissolved separately in aqua regia and HNO3. Deviations due to variation of matrix contents in the external standard solutions were evaluated and the analysis results of the two digestion methods for iron meteorites were assessed.ResultsOur results show obvious deviations due to unmatched matrix contents in the external standard solutions. Furthermore, discrepancy in the measurement of some elements was found between the sample solutions prepared with aqua regia and HNO3, due to loss of chloride during sample preparation and/or incomplete digestion of highly siderophile elements in iron meteorites.ConclusionsAn accurate ICP‐MS analysis method for extraterrestrial metal samples has been established using external standard solutions with matched matrix contents and digesting the samples with HNO3and aqua regia. Using the data from this work, the Mundrabilla iron meteorite previously classified as IAB‐ung is reclassified as IAB‐MG. Copyright © 2016 John Wiley & Sons, Ltd.