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[前沿] Mg同位素高精度测定的前提条件

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发表于 2014-3-28 01:38 | 显示全部楼层 |阅读模式
RATIONALE
High accuracy is the prerequisite for high-precision isotopic analysis.

METHODS
Here 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.

RESULTS
Our 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.

CONCLUSIONS
Detailed tests and tight controls on these effects are thus needed for high-precision high-accuracy stable Mg isotopic analysis. Copyright © 2013 John Wiley & Sons, Ltd.
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镁同位素, 高精度, MC-ICPMS
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