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Issue 9, 2014
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Cadmium isotope ratio measurements in environmental matrices by MC-ICP-MS

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Various stages of an analytical method for high-precision cadmium (Cd) isotope ratio measurements by MC-ICP-MS (sample preparation, matrix separation, instrumental analysis and data evaluation) were critically evaluated and optimized for the processing of carbon-rich environmental samples. Overall reproducibility of the method was assessed by replicate preparation and Cd isotope ratio measurements in various environmental matrices (soil, sediment, Fe–Mn nodules, sludge, kidney, liver, leaves) and was found to be better than 0.1‰ (2σ for δ114Cd/110Cd) for the majority of samples. Cd isotope ratio data for several commercially-available reference materials are presented and compared with previously published results where available. The method was used in a pilot study focusing on the assessment of factors affecting Cd isotope composition in tree leaves. A summary of results obtained for a large number (n > 80) of birch (Betula pubescenes) leaves collected from different locations in Sweden and through the entire growing season is presented and potential reasons for observed variability in Cd isotope composition are discussed. Seasonal dynamics of element concentrations and isotope compositions in leaves were also compared for Os, Pb, Zn and Cd.

Graphical abstract: Cadmium isotope ratio measurements in environmental matrices by MC-ICP-MS

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The article was received on 16 Apr 2014, accepted on 20 Jun 2014 and first published on 20 Jun 2014

Article type: Paper
DOI: 10.1039/C4JA00125G
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J. Anal. At. Spectrom., 2014,29, 1570-1584

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    Cadmium isotope ratio measurements in environmental matrices by MC-ICP-MS

    N. Pallavicini, E. Engström, D. C. Baxter, B. Öhlander, J. Ingri and I. Rodushkin, J. Anal. At. Spectrom., 2014, 29, 1570
    DOI: 10.1039/C4JA00125G

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