title: Collisionally activated decomposition mass spectrometry/mass spectrometry determination of organophosphorus pesticide residues in foods.
abstract: Representative collisionally activated decomposition mass spectrometry/mass spectrometry spectra of omethoate, parathion, and azinphos-methyl pesticides are described. Crude and cleaned up extracts of strawberries or lettuce fortified at the 0.2 ppm level with omethoate, parathion, and azinphos-methyl were examined using the direct exposure probe. Cleaned up extracts produced better data because the large overburden of interfering coextractives was removed.
mesh_terms: D005506:Food Contamination / Q000032:analysis*; D007306:Insecticides / Q000032:analysis*; D013058:Mass Spectrometry; D009943:Organophosphorus Compounds; D010573:Pesticide Residues / Q000032:analysis*; D010944:Plants / Q000032:analysis
chemical_list: D007306:Insecticides; D009943:Organophosphorus Compounds; D010573:Pesticide Residues