Abstract:

An analysis procedure was developed for multi-residue pesticides in fruits using matrix solid-phase dispersion extraction combined with gas chromatography-mass spectrometry (GC-MS) detection. Fruit samples were shattered and grinded together with florisil and Na2SO4, and the extracts were cleaned up on a graphitized carbon black column using ethyl acetate as the eluant and concentrated prior to GC-MS detection in a selected ion monitoring mode. The recoveries of 61 pesticides were ranged from 73.6%－113.7%, and the relative standard deviations all were below 13.7%. The detection limits were ranged from 0.002 to 0.01 mg/kg. Generally, the proposed method is proved to be quick, economic，time-saving and labour-saving.

Key words: matrix solid-phase dispersion, multi-residue pesticides, gas chromatography-mass spectrometry (GCMS), fruits