First Multi-Isotopic (Pb-Nd-Sr-Zn-Cu-Fe) Characterisation of Dust Reference Materials (ATD and BCR-723): A Multi-Column Chromatographic Method Optimised to Trace Mineral and Anthropogenic Dust Sources

Aubry Vanderstraeten, Steeve Bonneville, Stefania Gili, Jeroen de Jong, Wendy Debouge, Philippe Claeys, Nadine Mattielli

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    Abstract

    Atmospheric dust is an integral component of the Earth system with major implications for the climate, biosphere and public health. In this context, identifying and quantifying the provenance and the processes generating the various types of dust found in the atmosphere is paramount. Isotopic signatures of Pb, Nd, Sr, Zn, Cu and Fe are commonly used as sensitive geochemical tracers. However, their combined use is limited by the lack of (a) a dedicated chromatographic protocol to separate the six elements of interest for low-mass samples and (b) specific reference materials for dust. Indeed, our work shows that USGS rock reference materials BHVO-2, AGV-2 and G-2 are not applicable as substitute reference materials for dust. We characterised the isotopic signatures of these six elements in dust reference materials ATD and BCR-723, representatives of natural and urban environments, respectively. To achieve this, we developed a specific procedure for dust, applicable in the 4–25 mg mass range, to separate the six elements using a multi-column ion-exchange chromatographic method and MC-ICP-MS measurements.
    Original languageEnglish
    Article number12320
    Pages (from-to)307-329
    Number of pages24
    JournalGeostandards and Geoanalytical Research
    Volume44
    Issue number2
    Publication statusPublished - Jun 2020

    Bibliographical note

    Funding Information:
    This work was supported by the Fonds de la recherche scientifique (FRS‐FNRS) ‘Grand Equipement – Infrastructure’ n°. 2.5016.12 and the Belgian Science Policy (Belspo) [BR/175/A2/CHASE]. SB was supported by the FRS‐FNRS PDR T.1012.14. We warmly thank William M. Landing and Peter L. Morton from Florida State University (USA) for providing us with the ATD dust. We also thank Johan Yans, Augustin Dekoninck and Michèle Verhaert from Université de Namur (Belgium) for the Saharan dust precursor samples and Jacqueline Vander Auwera from Université de Liège (Belgium) for the dust precursor from Patagonia. Dr Christophe Quétel and four anonymous reviewers are thanked for their relevant comments, which helped to improve the quality of this manuscript.

    Funding Information:
    This work was supported by the Fonds de la recherche scientifique (FRS-FNRS) ?Grand Equipement ? Infrastructure? n?. 2.5016.12 and the Belgian Science Policy (Belspo) [BR/175/A2/CHASE]. SB was supported by the FRS-FNRS PDR T.1012.14. We warmly thank William M. Landing and Peter L. Morton from Florida State University (USA) for providing us with the ATD dust. We also thank Johan Yans, Augustin Dekoninck and Mich?le Verhaert from Universit? de Namur (Belgium) for the Saharan dust precursor samples and Jacqueline Vander Auwera from Universit? de Li?ge (Belgium) for the dust precursor from Patagonia. Dr Christophe Qu?tel and four anonymous reviewers are thanked for their relevant comments, which helped to improve the quality of this manuscript.

    Publisher Copyright:
    © 2020 The Authors. Geostandards and Geoanalytical Research © 2020 International Association of Geoanalysts

    Copyright:
    Copyright 2020 Elsevier B.V., All rights reserved.

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