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Comprehensive-Trace Level Determination of Methyltin Compounds in Aqueous Samples by Cryogenic Purge-and-Trap Gas Chromatography with Flame Photometric Detection

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Abstract

A comprehensive method was developed for the sensitive and fast determination of trace levels of methyltin compounds in aqueous samples. Tin compounds in aqueous solution at pH 5 were converted to the corresponding volatile hydrides: CH3SnH3, (CH3)2SnH2, and (CH3)3SnH, by reaction with potassium borohydride. A CP-4010 purge and trap injector (PTI) was used to purge analyte species from water directly. The volatile derivatives were base-line separated on a capillary column in an Angilent-6890 gas chromatograph by a suitable temperature program and were detected by a flame photometric detector (FPD). The detection limits were 18 ng L−1 for monomethyltin, 12 ng L−1 for dimethyltin, and 3 ng L−1 for trimethyltin, respectively. This method was successfully applied to the determination of methyltin compounds in different aqueous samples.

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Authors and Affiliations

  1. Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, P. O. Box 2871, Beijing, 100085, China

    Jiemin Liu, Guibin Jiang, Qunfang Zhou & Ziwei Yao

Authors
  1. Jiemin Liu
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  2. Guibin Jiang
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  3. Qunfang Zhou
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  4. Ziwei Yao
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Correspondence to Guibin Jiang.

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Liu, J., Jiang, G., Zhou, Q. et al. Comprehensive-Trace Level Determination of Methyltin Compounds in Aqueous Samples by Cryogenic Purge-and-Trap Gas Chromatography with Flame Photometric Detection. ANAL. SCI. 17, 1279–1283 (2001). https://doi.org/10.2116/analsci.17.1279

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  • DOI: https://doi.org/10.2116/analsci.17.1279

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