title: Chemical ionization mass spectrometry of organophosphorus insecticides.
mesh_terms: D055598:Chemical Phenomena; D002621:Chemistry; D004583:Electrons; D007306:Insecticides / Q000032:analysis*; D007477:Ions; D013058:Mass Spectrometry / Q000379:methods; D008970:Molecular Weight; D009943:Organophosphorus Compounds; D009946:Organothiophosphorus Compounds; D010573:Pesticide Residues / Q000032:analysis
chemical_list: D007306:Insecticides; D007477:Ions; D009943:Organophosphorus Compounds; D009946:Organothiophosphorus Compounds; D010573:Pesticide Residues