title: Column extraction of organophosphorus pesticide residues from plants.
mesh_terms: D007306:Insecticides / Q000302:isolation & purification*; D008722:Methods; D009943:Organophosphorus Compounds; D010573:Pesticide Residues / Q000302:isolation & purification*; D010761:Phosphorus Radioisotopes; D010944:Plants / Q000032:analysis*
chemical_list: D007306:Insecticides; D009943:Organophosphorus Compounds; D010573:Pesticide Residues; D010761:Phosphorus Radioisotopes