Multiresidue Screening of Pesticides in Foods Using Retention Time Locking, GC-AED, Database Search, and GC/MS Identification

DOI PDF 被引用文献2件
  • Joanne Cook
    Florida Department of Agriculture and Consumer Services, Chemical Residue Laboratory, 3125 Conner Blvd, Lab 3, Tallahassee, FL 32219-1650
  • Marc Engel
    Florida Department of Agriculture and Consumer Services, Chemical Residue Laboratory, 3125 Conner Blvd, Lab 3, Tallahassee, FL 32219-1650
  • Philip Wylie
    Hewlett-Packard Company, Little Falls Analytical Division, 2850 Centerville Rd, Wilmington, DE 19808-1610
  • Bruce Quimby
    Hewlett-Packard Company, Little Falls Analytical Division, 2850 Centerville Rd, Wilmington, DE 19808-1610

説明

<jats:title>Abstract</jats:title> <jats:p>Fruit and vegetable extracts were screened for over 400 pesticides by gas chromatography with atomic emission detection (GC-AED) and an experimental database. A technique called retention time locking was used to match GC-AED and GC with mass spectrometry (MS) retention times to those of the database. Samples were analyzed for sulfur, nitrogen, phosphorus, and chlorine by GC-AED. Possible pesticides were suggested by database search and identified by GC/MS. Forty-four pesticide standards were analyzed to determine the precision of retention time matching and the accuracy of the database search. Analytical retention times matched database retention times within 0.32 min. Using elemental criteria, the database search identified the correct compound for 41 of 44 pesticide standards. For blind spikes of fruit and vegetable extracts, the database suggested 22 of 26 spiked pesticides as matches. Nineteen were identified by GC/MS. The combination of retention time locking, GC-AED, database search, and GC/MS can be a powerful tool for identifying pesticides in a complex matrix</jats:p>

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