Quantification of methylated selenium, sulfur, and arsenic in the environment
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2014
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01A - Journal article
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PLOS ONE
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9
Issue / Number
7
Pages / Duration
e102906
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Public Library of Science
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Abstract
Biomethylation and volatilization of trace elements may contribute to their redistribution in the environment. However, quantification of volatile, methylated species in the environment is complicated by a lack of straightforward and field-deployable air sampling methods that preserve element speciation. This paper presents a robust and versatile gas trapping method for the simultaneous preconcentration of volatile selenium (Se), sulfur (S), and arsenic (As) species. Using HPLC-HR-ICP-MS and ESI-MS/MS analyses, we demonstrate that volatile Se and S species efficiently transform into specific non-volatile compounds during trapping, which enables the deduction of the original gaseous speciation. With minor adaptations, the presented HPLC-HR-ICP-MS method also allows for the quantification of 13 non-volatile methylated species and oxyanions of Se, S, and As in natural waters. Application of these methods in a peatland indicated that, at the selected sites, fluxes varied between 190–210 ng Se·m−2·d−1, 90–270 ng As·m−2·d−1, and 4–14 µg S·m−2·d−1, and contained at least 70% methylated Se and S species. In the surface water, methylated species were particularly abundant for As (>50% of total As). Our results indicate that methylation plays a significant role in the biogeochemical cycles of these elements.
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1932-6203
Language
English
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Yes
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Published
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Citation
Vriens, B., Ammann, A., Hagendorfer, H., Lenz, M., Berg, M., & Winkel, L. (2014). Quantification of methylated selenium, sulfur, and arsenic in the environment. Plos One, 9(7), e102906. https://doi.org/10.26041/fhnw-1534