Get access

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

Authors

  • Fang-Zhen Teng,

    Corresponding author
    1. Isotope Laboratory, Department of Earth and Space Sciences, University of Washington, Seattle, WA, USA
    2. Isotope Laboratory, Department of Geosciences, University of Arkansas, Fayetteville, AR, USA
    • Correspondence to: F.-Z. Teng, Isotope Laboratory, Department of Earth and Space Sciences, University of Washington, Seattle, WA 98195, USA.

      E-mail: fteng@u.washington.edu

    Search for more papers by this author
  • Wei Yang

    1. Isotope Laboratory, Department of Geosciences, University of Arkansas, Fayetteville, AR, USA
    2. Key Laboratory of the Earth's Deep Interior, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing, China
    Search for more papers by this author

Abstract

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.

Ancillary