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