SOLID-PHASE EXTRACTION CLEANUP OF HALOGENATED ORGANIC PESTICIDES

This study investigated the potential of solid-phase extraction (SPE) cartridges as replacements for Attagel in the cleanup procedure of halogenated organic pesticides in raw agricultural crops. Four commodities, broccoli, carrot, celery, and orange, were fortified with a total of 44 pesticides. Pesticides were analyzed by gas chromatography (GC) with electron capture detection (ECD). Cleanup with either C-18 or Florisil SPE showed recoveries comparable to or better than that obtained by Attagel in most cases. Both C-18 and Florisil SPEs showed significant differences in recoveries compared to that of Attagel.