Abstract: Organophosphate pesticides(OPPs)have been widely used for pest control in recent years.Although they are effective tools in control of plant disease, their residue in food samples has a large of potential hazard to humans.Thus, effective extraction and determination of OPPs from food samples is vital for the food safety.In this study, poly-(3, 3′-dodecane-1, 1′-bis-1-vinylimidazolium dibromide)modified-silica(Poly(DBVD)-Sil)was prepared, characterized and used as adsorbent in solid-phase extraction.The extraction performance of the resulting Poly(DBVD)-Sil was evaluated using three OPPs(quintiophos, fenthion and phoxim)as model analytes by combining with high-performance liquid chromatography-ultraviolet detection.Some parameters(adsorbent amount, sample flow rate, elution solvent and elution volume)affecting the extraction efficiency were investigated in detail.Under the optimized conditions, the method showed good linearity for the analytes in the concentration range of 0.1-400 μg/L and low RSD of 1.71%-4.08%(n=5).The limit of detection, based on a signal-to-noise(S/N)of 3, was 0.01 μg/L for three OPPs.The proposed method was successfully used to determine OPPs from two tea drink samples with satisfactory relative recoveries of 83.23%-109.89% and RSDs of 3.07%-6.62%(n=3).The results indicate that the developed method has great potential to determine trace OPPs from food samples.