title: Detection of O,O-diethyl-O-(2,5-dichlorophenyl) phosphorothioate and O,O-diethyl-O-(3,6-dichloro-2-pyridyl) phosphorothioate in meat fat.
abstract: Two previously unreported organophosphorus residues have been detected in meat fat. The first, O,O-diethyl-O-(2,5-dichlorophenyl) phosphorothioate, apparently results from the debromination of bromophos-ethyl, while the other, O,O-diethy-O-(3,6-dichloro-2-pyridyl) phosphorothioate, presumably arises by the monodechlorination of chlorpyriphos. Mass spectral evidence is presented in support of the assigned structures and gas-liquid chromatographic retention data for the residues and their oxygen analogs are provided.
mesh_terms: D004390:Chlorpyrifos / Q000031:analogs & derivatives / Q000378:metabolism; D002849:Chromatography, Gas; D002853:Chromatography, Liquid; D005223:Fats / Q000032:analysis*; D007306:Insecticides / Q000031:analogs & derivatives / Q000032:analysis* / Q000378:metabolism; D013058:Mass Spectrometry; D008460:Meat / Q000032:analysis*; D010573:Pesticide Residues / Q000032:analysis*
chemical_list: D005223:Fats; D007306:Insecticides; D010573:Pesticide Residues; D004390:Chlorpyrifos