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Simple and rapid method for the determination of ethylenebisdithiocarbamate fungicides in fruits and vegetables using liquid chromatography with tandem mass spectrometry

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Abstract

A simple and rapid method for determining ethylenebisdithiocarbamates (EBDCs; mancozeb, maneb, and zineb) in fruits and vegetables is described. EBDCs are transformed into dimethylethylenebisdithiocarbamate (EBDC-dimethyl) by methylation after their decomposition with ethylenediaminetetraacetic acid (EDTA). These processes were performed simultaneously in this method. Dimethyl sulfate was used as the methylation reagent, and acetonitrile extracts obtained from partitioning with anhydrous magnesium sulfate and sodium chloride were subjected to dispersive solid-phase extraction with the primary secondary amine sorbent. Liquid chromatography with tandem mass spectrometry in the positive heated-electrospray ionization mode was used for the determination of EBDC-dimethyl produced from EBDCs. The method was validated at levels of 10, 50, and 100 ng g−1 maneb as a representative EBDC. The recoveries of the present method were between 71 and 101%. The limits of detection and quantification were 0.24 and 0.8 ng g−1 maneb, respectively.

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Correspondence to Tadashi Hayama.

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Hayama, T., Takada, M. Simple and rapid method for the determination of ethylenebisdithiocarbamate fungicides in fruits and vegetables using liquid chromatography with tandem mass spectrometry. Anal Bioanal Chem 392, 969–976 (2008). https://doi.org/10.1007/s00216-008-2346-8

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  • DOI: https://doi.org/10.1007/s00216-008-2346-8

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