title: Automated sample cleanup for pesticide multiresidue analysis. III. Evaluation of complete system for screening subtolerance residues in vegetables.
abstract: An automated continuous flow sample cleanup system intended for rapid screening of foods for pesticide residues in fresh and processed vegetables has been developed. Recovery and precision data for 8 pesticides in each of 3 crops are compared for the automated and manual procedures. Average recovery for samples fortified with pesticides between 0.026 and 0.277 ppm was 98% for the automated system and 92% for the manual procedure. Average coefficient of variation was 6.6% for the automated system and 4.2% for the manual procedure. In another evaluation, the automated system gave an average recovery of 95% for 12 pesticides commonly found in imported foods; the manual procedure gave an average recovery of 91%. Thus, the results obtained so far indicate that the automated system for sample cleanup gives results comparable to those obtained by manual procedures.
mesh_terms: D002852:Chromatography, Ion Exchange; D005069:Evaluation Studies as Topic; D010573:Pesticide Residues / Q000032:analysis*; D014675:Vegetables / Q000032:analysis*
chemical_list: D010573:Pesticide Residues