Abstract: Nowadays pesticide residues in foods were receiving more and more attention due to the vast use of pesticides. To improve the technique of pesticide residue determination was an important means to assay pesticide residue. Sample preparation was a time- consuming and fallible stage in the determination. Therefore improving the sample preparation technique could enhance the efficiency and veracity of the determination. This article was to review several sample preparation techniques such as solid-phase extraction, solid-phase microextraction, microwave aided extraction, supercritical fluid extraction and gel permeation chromatography.

Key words: food, pesticide residue analysis, sample preparation technique