Mg Isotope Interlaboratory Comparison of Reference Materials from Earth‐Surface Low‐Temperature Environments |
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| Authors: | Netta Shalev Juraj Farka? Jan Fietzke Martin Novák Jan A Schuessler Philip AE Pogge von Strandmann Philip B Törber |
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| Affiliation: | 1. Institute of Earth Science, The Hebrew University of Jerusalem, Edmond J. Safra Campus, Jerusalem, Israel;2. Geological Survey of Israel, Jerusalem, Israel;3. Department of Earth Sciences, Institute of Geochemistry and Petrology, ETH Zürich, Zürich, Switzerland;4. Faculty of Environmental Sciences, Czech University of Life Sciences Prague, Czech Republic;5. Department of Geochemistry, Czech Geological Survey, Czech Republic;6. Department of Earth Sciences, University of Adelaide, North Terrace, Adelaide, SA, Australia;7. GEOMAR Helmholtz Center for Ocean Research Kiel, Kiel, Germany;8. GFZ German Research Centre for Geosciences, Telegrafenberg, Potsdam, Germany;9. London Geochemistry and Isotope Centre (LOGIC), University College London, and Birkbeck, University of London, London, UK;10. Bristol Isotope Group (BIG), Bristol University, Bristol, UK |
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| Abstract: | To enable quality control of measurement procedures for determinations of Mg isotope amount ratios, expressed as δ26Mg and δ25Mg values, in Earth‐surface studies, the δ26Mg and δ25Mg values of eight reference materials (RMs) were determined by interlaboratory comparison between five laboratories and considering published data, if available. These matrix RMs, including river water SLRS‐5, spring water NIST SRM 1640a, Dead Sea brine DSW‐1, dolomites JDo‐1 and BCS‐CRM 512, limestone BCS‐CRM 513, soil NIST SRM 2709a and vegetation NIST SRM 1515, are representative of a wide range of Earth‐surface materials from low‐temperature environments. The interlaboratory variability, 2s (twice the standard deviation), of all eight RMs ranges from 0.05 to 0.17‰ in δ26Mg. Thus, it is suggested that all these materials are suitable for validation of δ26Mg and δ25Mg determinations in Earth‐surface geochemical studies. |
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| Keywords: | Earth‐surface interlaboratory comparison low‐temperature Mg isotopes reference materials |
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