PESTICIDE-RESIDUE ANALYSES IN PLANT-MATERIAL BY CHROMATOGRAPHIC METHODS - CLEANUP PROCEDURES AND SELECTIVE DETECTORS

This paper deals with the analysis of pesticide residues by chromatogr aphic methods in samples of plant origin. Emphasis is put on the isola tion and clean-up steps of the sample preparation for GC or LC determi nation. The problems of the extraction solvent selection and clean-up procedures using different types of adsorption column chromatography o r gel permeation chromatography are discussed Attention is also given to alternative techniques such as supercritical fluid extraction (SFE) , matrix solid-phase dispersion (extraction) (MSPD) and sweep co-disti llation that are used for sample processing prior to GC and LC analysi s. Currently, pesticide residue analyses are typically multi-residue p rocedures with highly sensitive methods. Consumption of costly and tox ic solvents is being minimized and fully automated analytical procedur es can be expected in the future.