Isotope Laboratory, Department of Earth and Space Sciences, University of Washington, Seattle, WA, 98195, USA; Isotope Laboratory, Department of Geosciences, University of Arkansas, Fayetteville, AR, 72701, USA.
Rapid Commun Mass Spectrom. 2014 Jan 15;28(1):19-24. doi: 10.1002/rcm.6752.
High accuracy is the prerequisite for high-precision isotopic analysis.
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.
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.
Detailed tests and tight controls on these effects are thus needed for high-precision high-accuracy stable Mg isotopic analysis.
高精度是高精度同位素分析的前提。
在这里，我们评估了基质元素的存在以及样品和标准品之间在镁浓度和酸摩尔浓度方面的不匹配如何影响 Nu Plasma 和 IsoProbe 多接收电感耦合等离子体质谱仪 (MC-ICPMS) 上稳定镁同位素分析的精度。
我们的结果表明，这些因素可能导致镁同位素高精度分析中出现大于 1‰的偏差。这些精度偏差的程度和方向因仪器、仪器设置和不同实验室而异。
因此，需要对这些影响进行详细测试和严格控制，以实现高精度、高准确度的稳定镁同位素分析。
