On-column partition cleanup of fatty extracts for organophosphate pesticide residue determination.
A fast, single-step, and efficient partition between n-hexane and acetonitrile on ready-to-use, disposable mini-columns of Kieselghur-type material has been developed for the cleanup of fatty extracts for organophosphate (OP) pesticide residue determination by gas chromatography with flame photometric detection. Nine OP pesticides (diazinon, etrimfos, chlorpyrifos-methyl, pyrimiphos-methyl, chlorpyrifos, bromophos, bromophos-ethyl, malathion, fenitrothion) most commonly used for protection of stored cereals, oil seeds, and legumes were separated from up to 2.0 g lipidic material with recoveries between 80 and 107% at spiking levels ranging for the different compounds from 0.1 to 5.0 ppm.
D002849:Chromatography, Gas; D002523:Edible Grain / Q000032:analysis; D005504:Food Analysis; D007306:Insecticides / Q000032:analysis*; D008055:Lipids / Q000032:analysis*; D000069463:Olive Oil; D009943:Organophosphorus Compounds; D010573:Pesticide Residues / Q000032:analysis*; D010783:Photometry; D010938:Plant Oils / Q000032:analysis
D007306:Insecticides; D008055:Lipids; D000069463:Olive Oil; D009943:Organophosphorus Compounds; D010573:Pesticide Residues; D010938:Plant Oils