Comparison of factors affecting the accuracy of high-precision magnesium isotope analysis by multi-collector inductively coupled plasma mass spectrometry

被引：116
|
作者：
Teng, Fang-Zhen [1 ,2 ]
Yang, Wei [2 ,3 ]
机构：
[1] Univ Washington, Dept Earth & Space Sci, Isotope Lab, Seattle, WA 98195 USA
[2] Univ Arkansas, Dept Geosci, Isotope Lab, Fayetteville, AR 72701 USA
[3] Chinese Acad Sci, Inst Geol & Geophys, Key Lab Earths Deep Interior, Beijing 100029, Peoples R China
来源：
RAPID COMMUNICATIONS IN MASS SPECTROMETRY | 2014年 / 28卷 / 01期
基金：
美国国家科学基金会;
关键词：
ALUMINUM-RICH INCLUSIONS; NORTH CHINA CRATON; PERIDOTITE XENOLITHS; MANTLE XENOLITHS; ICP-MS; FRACTIONATION; MG; CHONDRITES; METEORITES; DIFFUSION;
D O I：
10.1002/rcm.6752
中图分类号：
Q5 [生物化学];
学科分类号：
071010 ; 081704 ;
摘要：
RATIONALEHigh accuracy is the prerequisite for high-precision isotopic analysis. METHODSHere we evaluate how the presence of matrix elements, and mismatch between samples and standards in Mg concentration and acid molarity affect the accuracy of stable Mg isotopic analysis on Nu Plasma and IsoProbe multi-collector inductively coupled plasma mass spectrometry (MC-ICPMS) instruments. RESULTSOur results show that these factors can lead to large (>1) deviation in the high-precision analysis of Mg isotopes. The degree and direction of these accuracy offsets can vary for different instruments, instrumental settings and different laboratories. CONCLUSIONSDetailed tests and tight controls on these effects are thus needed for high-precision high-accuracy stable Mg isotopic analysis. Copyright (c) 2013 John Wiley & Sons, Ltd.
引用
收藏
页码：19 / 24
页数：6
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