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Analysis of carbamate pesticides in water samples using single-drop microextraction and gas chromatography–mass spectrometry

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Abstract

Single-drop microextraction (SDME) followed by gas chromatography–mass spectrometry detection was used for the determination of some carbamate pesticides in water samples. The studied pesticides were thiofanox, carbofuran, pirimicarb, methiocarb, carbaryl, propoxur, desmedipham and phenmedipham. Two alternative sample introduction methods have been examined and compared; SDME followed by cool on-column injection (without derivatization) and SDME followed by in-microvial derivatization and splitless injection. Acetic anhydride was used as derivatization reagent. Parameters that affect the derivatization reaction yield and the extraction efficiency of the SDME method were studied and optimized. The analytical performances and possible applications of both approaches were investigated. Relative standard deviations for the studied compounds ranged from 3.2 to 8.3%. The detection limits obtained by the derivatization method were found to be in the range 3–35 ng/L. Using cool on-column injection (without derivatization), the detection limits were between 30 and 80 ng/L.

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Acknowledgments

The authors are grateful to the Research Council of Isfahan University of Technology (IUT) for financial support of this project.

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Authors and Affiliations

  1. Department of Chemistry, Isfahan University of Technology, Isfahan, 84154-83111, Iran

    Mohammad Saraji & Nafise Esteki

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  1. Mohammad Saraji
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  2. Nafise Esteki
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Correspondence to Mohammad Saraji.

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Saraji, M., Esteki, N. Analysis of carbamate pesticides in water samples using single-drop microextraction and gas chromatography–mass spectrometry. Anal Bioanal Chem 391, 1091–1100 (2008). https://doi.org/10.1007/s00216-008-2087-8

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  • DOI: https://doi.org/10.1007/s00216-008-2087-8

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