Multiresidue analysis of pesticides in foods using acetonitrileextraction, gel permeation chromatography and mini-column cleanup, anddual-column GC-ECD Japanese

摘要

We investigated simultaneous and consecutive analytical methods for pesticide residues in large numbers of food samples using acetonitrile extraction, followed by gel permeation chromatography (GPC) and mini cartridge column cleanup, and then dual-column GC. A new apparatus with a graduated cylinder for vacuum filtration, salting-out and separation of a fixed quantity of the acetonitrile layer was developed. A test solution, cleaned up with GPC (column, Shodex(R) CLNpak EV-2000 and mobile phase, acetone-cyclohexane (1 : 4)) and with a silica-gel mini column, was subjected to dual-column GC (Rtx(R)-CLPesticides and Rtx(R)-CLPesticides2) equipped with ECD. Florisil mini-column fractionation was effective for further clean-up.