Extraction and cleanup of organochlorine, organophosphate, organonitrogen, and hydrocarbon pesticides in produce for determination by gas-liquid chromatography.
A rapid, multiresidue procedure utilizing the minimal cleanup necessary for gas-liquid chromatographic (GLC) analysis is presented. The samples are extraced with acetone and partitioned with methylene chloride-petroleum either to remove water. The organophosphorus and organonitrogen compounds are then quantitated by GLC, using a KCl thermionic detector. A Florisil cleanup of the extract is performed prior to the determination of organochlorine compounds by a GLC electron capture detector. Carbon-hydrogen compounds such as biphenyl and o-phenylphenol undergo the Florisil cleanup and may also be quantitated by GLC. Quantitative recoveries for 15 organophosphorus, 9 organochlorine, 5 organonitrogen, and 2 hydrocarbon pesticides show the range in polarities of pesticides recovered, from Monitor to biphenyl. The method is simple and fast with a great potential for the analysis of many more compounds.
D002219:Carbamates; D002849:Chromatography, Gas; D006838:Hydrocarbons / Q000032:analysis; D007306:Insecticides / Q000032:analysis; D008722:Methods; D009943:Organophosphorus Compounds; D010573:Pesticide Residues / Q000032:analysis*
D002219:Carbamates; D006838:Hydrocarbons; D007306:Insecticides; D009943:Organophosphorus Compounds; D010573:Pesticide Residues