title: Optimization of sweep codistillation apparatus for determination of coumaphos and other organophosphorus pesticide residues in animal fat.
abstract: Optimum conditions have been developed for the quantitative recovery of coumaphos from animal fat by using a commercial sweep codistillation unit. Under the conditions specified (255 degrees C distillation temperature, 250 mL/min of nitrogen, 60 min sweep time) and using Florisil trapping, the mean recovery of coumaphos was 91% with a coefficient of variation of 6%. Other organophosphorus pesticides recovered include diazinon, chlorpyrifos, ethion, and bromophos-ethyl with recoveries ranging from 90 to 96% and coefficients of variation ranging between 4 and 6%.
mesh_terms: D000818:Animals; D002417:Cattle; D002849:Chromatography, Gas; D003372:Coumaphos / Q000032:analysis*; D004041:Dietary Fats / Q000032:analysis*; D007306:Insecticides / Q000032:analysis*; D008460:Meat / Q000032:analysis*; D010573:Pesticide Residues / Q000032:analysis*
chemical_list: D004041:Dietary Fats; D007306:Insecticides; D010573:Pesticide Residues; D003372:Coumaphos