General Method for Determination of Pesticide Residues in Samples of Plant Origin, Soil, and Water. I. Extraction and Cleanup

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Abstract
Acetone extraction followed by partition into methylene chloride is used to extract organophosphate, organochlorine, carbamate, thiocarbamate, urea, triazine, and other types of pesticides. The efficiency of acetone extraction is demonstrated with different samples and compounds. A general extraction scheme is presented which is suitable for the determination of parent compounds and many of their metabolites. Different samples are divided into 8 groups according to the extraction process and cleanup on mixed adsorbent (active carbon, magnesia, diatomaceous earth), alumina, or silica gel columns. Maximum possible loads, depending on sample type and mode of detection, are given for each adsorbent. The method is suitable for 143 of the 257 pesticides used in Hungary.

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