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Imidacloprid mesoporous surface molecularly imprinted polymer (MIP) was rapidly synthesized by one[1]step method, with imidacloprid as template molecule, methacrylic acid (MAA) as functional monomer, azodiisobutyronitrile (AIBN) as initiator and ethylene glycol dimethacrylate (EGDMA) as crosslinker. The characterization of MIP was completed by SEM, TEM, FT-IR, and nitrogen adsorption-desorption isotherms. The adsorption conditions were optimized. At the imidacloprid concentration of 100 µg/mL, MIP reached adsorption saturation and the adsorption time was shorter than that of the corresponding non-imprinted polymer (NIP), with the saturated adsorption value of 3.628 mg/g, and the imprinting factor of 1.27, indicating that the mesoporous structure and surface imprinting improved the mass transfer rate of imidacloprid in the adsorption process, so as to improving the adsorption capacity. In addition, under the same conditions, the adsorption capacity of MIP for imidacloprid was higher than acetamiprid, thiacloprid and thiamethoxam, indicating that MIP had better specific recognition ability. The imidacloprid mesoporous surface MIP can be prepared simply and rapidly, which may be a potential material in the field of sample pretreatment and rapid detection. © 2023, Youke Publishing Co.,Ltd. All rights reserved. 相似文献
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构建了一种基于量子点荧光微球的噻虫嗪快速测定免疫层析试纸条。该试纸条以偶联噻虫嗪单克隆抗体的量子点微球为荧光探针,噻虫嗪完全抗原(TMX-BSA)为T线,山羊抗小鼠IgG为C线。结果表明,抗体在探针合成中的最佳添加量为16μg、缓冲液pH 6.0、 N-(3-二甲氨基丙基)-N’-乙基碳二亚胺盐酸盐(EDC)浓度为0.1 mg/mL。试纸条对噻虫嗪检测在1~200 ng/mL范围内呈线性关系,标准曲线方程为y=-0.42x+0.99 (R2=0.989),检出限为1.64 ng/mL。将构建的试纸条应用于粮食样品中噻虫嗪的检测,加标回收率为79.5%~110.2%,相对标准偏差(RSD)为0.58%~12%,表明其可以满足粮食样品中残留的噻虫嗪检测。 相似文献
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建立了基于β-环糊精修饰的CdTe量子点(β-CD-CdTe)探针的菊酯类农药代谢产物的荧光检测方法。通过β-CD-CdTe的杯烃结构和菊酯类农药代谢产物间苯氧基苯甲醛(3-PBALD)苯环之间的“主-客体”相互作用形成包络物,实现了对3-PBALD的定量测定。在优化条件下,该荧光探针响应值与间苯氧基苯甲醛浓度在0.05~0.5μg/mL之间呈线性关系,线性方程为?IF=681.2c+192.5,检出限为0.03μg/mL。将其应用于水样中间苯氧基苯甲醛加标回收实验,回收率在84.7%~91.6%之间,相对标准偏差(RSD)低于4.3%。 相似文献
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