Determination of organophosphorus pesticide residues in carrot using gel permeation chromatography

To investigate the application of gel permeation chromatography to the determination of organophosphorus pesticides in carrot, phorate, dimethoate, pirimiphos-methyl, chlorfenvinphos, quinalphos and triazophos were chosen. Samples were extracted with ethyl acetate and the extracts cleanup by gel permeation chromatography using Bio-Beads SX-3 gel. The high pigment content of samples caused band broadening on the column.