title: Collaborative study of a method for organophosphorus pesticide residues in apples and green beans.
mesh_terms: D002722:Chlorobenzenes / Q000032:analysis; D003124:Colorimetry; D004117:Dimethoate / Q000032:analysis; D005638:Fruit / Q000737:chemistry*; D006358:Hot Temperature; D007306:Insecticides / Q000032:analysis*; D008722:Methods; D010261:Paraoxon / Q000032:analysis; D010278:Parathion / Q000032:analysis; D010573:Pesticide Residues / Q000032:analysis*; D004849:Phenylphosphonothioic Acid, 2-Ethyl 2-(4-Nitrophenyl) Ester / Q000032:analysis; D014675:Vegetables / Q000737:chemistry*
chemical_list: D002722:Chlorobenzenes; D007306:Insecticides; D010573:Pesticide Residues; D004849:Phenylphosphonothioic Acid, 2-Ethyl 2-(4-Nitrophenyl) Ester; D010278:Parathion; D010261:Paraoxon; D004117:Dimethoate