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Analysis of organophosphorus insecticides in natural waters by use of stir-bar-sorptive extraction then gas chromatography with atomic emission detection

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Summary

A procedure has been developed for the determination of eight organophosphorus insecticides in natural waters by use of stir-bar-sorptive extraction (SBSE) combined with thermal desorption-GC-atomic emission detection (AED). Optimization of the extraction and thermal desorption conditions showed that an extraction time of 50 min and a desorption time of 6 min were sufficient. Addition of salt and adjustment of the pH were not necessary. Recoveries of seven of the compounds investigated were between 62% and 88%. For fenamiphos, which is highly water-soluble, recovery was only 15%. The very low limits of detection, between 0.8 ng L−1 (ethion) and 15.4 ng L−1 (fenamiphos) indicate that the SBSE-GC-AED procedure is suitable for sensitive detection of OPP in natural waters. The procedure was evaluated with real water samples.

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Authors and Affiliations

  1. Department of Analytical Chemistry, UFZ-Centre for Environmental Research Leipzig-Halle, Permoserstr. 15, 04318, Leipzig, Germany

    S. Mothes, P. Popp & R. Wennrich

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  1. S. Mothes
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  2. P. Popp
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  3. R. Wennrich
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Mothes, S., Popp, P. & Wennrich, R. Analysis of organophosphorus insecticides in natural waters by use of stir-bar-sorptive extraction then gas chromatography with atomic emission detection. Chromatographia 57 (Suppl 1), S249–S252 (2003). https://doi.org/10.1007/BF02492111

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  • DOI: https://doi.org/10.1007/BF02492111

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