title: Multiresidue analysis of fourteen organophosphorus pesticides in natural waters.
mesh_terms: D002849:Chromatography, Gas; D004655:Emulsions / Q000032:analysis; D007306:Insecticides / Q000032:analysis*; D008722:Methods; D008832:Microchemistry; D009864:Ontario; D009943:Organophosphorus Compounds; D010573:Pesticide Residues / Q000032:analysis*; D014873:Water Pollutants / Q000032:analysis*
chemical_list: D004655:Emulsions; D007306:Insecticides; D009943:Organophosphorus Compounds; D010573:Pesticide Residues; D014873:Water Pollutants