关键词: 基质固相分散(MSPD), 农药, 蔬菜水果, 气相色谱

Abstract: An effective and simple multipesticide residues method based on a new sample preparation method-matrix solid-phase disperse and gas chromatography was studied to determine 31 pesticides (include 11 organochlorines, 5 pyrethrolds and15 organophosphates) in fruits and vegetables. The conventional liquid-liquid extract and the solid phase extract were displacedby matrix solid-phase disperse for extracting and cleaning the pesticide residues from fruits and vegetables. The pesticides wereassayed by gas chromatography with electron capture detection and flame photometric detection, while affirmation was done bygas chromatography with mass selective detection in selected ion mornitoring. The recovery range was 80.4%～112.7% withrelative standard deviation lower than 10%. It proved that most fruit and vegetable samples were appropriate to be analysed bythis method with satisfactory results in our laboratory.

Key words: matrix solid-phase disperse(MSPD), pesticide, fruits and vegetables, gas chromatography