title: Conversion of a conventional packed-column gas chromatograph to accommodate megabore columns. II. Determination of organophosphorus insecticides in environmental water.
abstract: Several methods involving solvent extraction or solid extraction (Amberlite XAD resins) were studied for the multi-residue recovery of fourteen organophosphorus compounds in water. It was found that extraction with ethyl acetate in a salted medium provided the most consistent data, both in terms of number of compounds recovered and percentage recovery. Amberlite XAD resins gave consistently high recoveries, and this was attributed to a matrix effect upon the particular nitrogen-phosphorus detector. The evaluation was made using a megabore column installed in a conventional packed-column chromatograph, and the results show that such a system is amenable to the multi-residue analysis of organophosphorus pesticides at very low costs.
authors.affiliation: Chemistry and Biochemistry Department, Université de Moncton, Canada.
authors.forename: C
authors.initials: C
authors.lastname: Mallet
authors.forename: V N
authors.initials: VN
authors.lastname: Mallet
mesh_terms: D002849:Chromatography, Gas / Q000295:instrumentation; D007306:Insecticides / Q000032:analysis*; D009943:Organophosphorus Compounds; D010573:Pesticide Residues / Q000032:analysis; D014873:Water Pollutants / Q000032:analysis*; D014874:Water Pollutants, Chemical / Q000032:analysis*
chemical_list: D007306:Insecticides; D009943:Organophosphorus Compounds; D010573:Pesticide Residues; D014873:Water Pollutants; D014874:Water Pollutants, Chemical