Abstract: A rapid method to determine 5 pyrethroid pesticide residues in wheat was established through optimizing the absorbent, elute, and sample to absorbent ratio. Wheat sample was treated by the matrix solid-phase dispersion (MSPD) technique using Florisil as absorbent. 5 pyrethroid pesticides were analyzed by gas chromatography with electron capture detector. The mean recoveries of 5 pyrethroid pesticides were ranged from 85.5% to 97.6% and the maximum RSD was 8.4%. This method is cost-saving, rapid, accurate, sensitive and can therefore be applied for simultaneous determination of pesticide residues in wheat.

Key words: matrix solid-phase dispersion (MSPD), gas chromatography (GC), wheat, pyrethroid, pesticides residue