Schiff base networks (SNWs) were introduced as a new stir bar coating, and a method of SNWs- coated stir bar sorptive extraction (SBSE) coupled to high performance liquid chromatography-ultraviolet detector (HPLC-UV) was developed for determination of pyrethroid pesticide residues in tobacco. The prepared amorphous SNWs polymer from melamine and 3,5-dihydroxybenzaldehyde riches in triazine rings, hydroxyl groups and amino groups, and the SNWs/polydimethylsiloxane (PDMS) stir bar prepared by sol-gel method can extract weakly polar pyrethroid pesticides through hydrophobic, π-π and hydrogen bonding. The SNWs/PDMS stir bar exhibited high extraction efficiency toward pyrethroid pesticides (70–76%) and good mechanical stability with reused time more than 50 times. Under the optimal experimental conditions, the limits of detection were 0.20 - 0.66 µg/L with relative standard deviation varying in the range of 2.3–8.2%, which meets the requirements of trace analysis of pesticide residues in the tobacco industry. The method was applied to the determination of six pyrethroid pesticides in cigarette samples, and the recovery for the spiked samples ranged from 82 to 117%, showing a great applicability for the analysis of pesticide residues in real samples with a complex sample matrix.

引入希夫碱网络（SNWs）作为一种新型搅拌棒涂层，建立了一种SNWs涂层搅拌棒吸附萃取（SBSE）与高效液相色谱-紫外检测器（HPLC-UV）联用的拟除虫菊酯类农药测定方法烟草中的残留物。由三聚氰胺和3,5-二羟基苯甲醛制备的无定形SNWs聚合物富含三嗪环、羟基和氨基，溶胶-凝胶法制备的SNWs/聚二甲基硅氧烷(PDMS)搅拌棒可以通过疏水、π作用萃取弱极性拟除虫菊酯类农药。 -π和氢键。 SNWs/PDMS搅拌棒对拟除虫菊酯类农药具有较高的提取效率（70-76%）和良好的机械稳定性，重复使用时间超过50次。在最佳实验条件下,检出限为0.20~0.66 µg/L,相对标准偏差为2.3%~8.2%,满足烟草行业农药残留痕量分析的要求。该方法用于卷烟样品中6种拟除虫菊酯类农药的测定，加标样品的回收率为82%~117%，对样品基质复杂的实际样品中农药残留分析具有良好的适用性。