两种毒死蜱分子印迹聚合物的制备及其识别性能研究

Study on the preparation of two kinds of chlorpyrifos imprinted polymers and its recognition properties

中文关键词:  毒死蜱  分子印迹  制备  识别机制

英文关键词:chlorpyrifos  molecular imprinting  preparation  recognition mechanism

中文摘要:

      目的 制备能特异性识别农药毒死蜱的分子印迹聚合物并研究其识别机制, 用于农作物中残留农药毒死蜱的分离富集及特异识别。方法 利用沉淀法制备两种毒死蜱印迹聚合物, 采用光谱手段、吸附实验和Scatchard分析等研究其结合机制。结果 制备的2种印迹聚合物对毒死蜱有特异吸附, 以甲基丙烯酸和2-乙烯基吡啶为单体制备的MIP存在两种结合位点。结论 两种单体MAA、2-VP分别与毒死蜱以1∶3和1∶2配比结合, 两种聚合物均可用于样品中毒死蜱的分离富集。

英文摘要:

      Objective Two kinds of chlorpyrifos imprinted polymers were prepared to specifically recognize residual chlorpyrifos in crop samples. The recognition mechanism was studied as well. Methods Two kinds of chlorpyrifos imprinted polymers were synthesized by precipitation polymerization. Spectral method, absorption experiment and Scatchard analysis were employed to evaluate its binding properties. Results The MIPs showed a high affinity to chlorpyrifos. Two kinds of binding sites existed in MIPs. Conclusion The binding ratio of chlorpyrifos to MAA and 2-VP were 1:3 and 1:2, respectively. The two kinds of MIPs couldbe used for the separation and preconcentration of chlorpyrifos in samples.