title: Determination of cyperquat (1-methyl-4-phenylpyridinium chloride) residues in soil by gas-liquid chromatography.
mesh_terms: D006540:Herbicides / Q000032:analysis*; D006865:Hydrogenation; D010573:Pesticide Residues / Q000032:analysis; D010880:Piperidines / Q000032:analysis; D011726:Pyridinium Compounds / Q000032:analysis*; D012989:Soil Pollutants / Q000032:analysis*
chemical_list: D006540:Herbicides; D010573:Pesticide Residues; D010880:Piperidines; D011726:Pyridinium Compounds; D012989:Soil Pollutants