Features of the separation of pesticides of different classes by reversed-phase high-performance chromatography

Abstract

The effect of the concentration and the nature of an organic modifier, the composition of a buffer solution, and the pH of the mobile phase on the efficiency and selectivity of the separation of some pesticides (difenoconazole, propiconazole, penconazole, fludioxonil, thiram, 2,4-dichlorophenoxyacetic acid, linuron, lenacil, benomyl, acetamiprid, chlorsulfoxime, rimsulfuron, chlorsulfuron, and dicamba) on a Diaspher C16 silica gel were examined. The dependence of the retention on the hydrophobicity of these pesticides were compared. The possibility of the group separation and determination of pesticides with the use of the mobile phase acetonitrile-phosphate buffer solution (0.01 M, pH 4.2) (40: 60) was demonstrated.