Solid Phase Extraction of Pesticides from Fruits and Vegetables, for Analysis by GC or HPLC

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Courtesy of Sigma-Aldrich Co., LLC

Recovery rates for polar analytes, including carbamate and thiourea pesticides, are higher and less variable with ENVI-Carb carbon-based solid phase extraction tubes than with C8- or C18- silica-based tubes. Independent investigators found ENVI-Carb tubes to be an effective part of sample cleanup for more than 200 organochlorine, organophosphorus, nitrogen-containing, and carbamate pesticides, from many fruits and vegetables. ENVI-Carb tubes enabled these investigators to recover several pesticides they could not recover from charcoal/Celite minicolumns, and eliminated their labor-intensive minicolumn preparation process.  Analysis for most of these pesticides is by GC; 10 carbamates are analyzed by HPLC.

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