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OALib Journal期刊
ISSN: 2333-9721
费用：99美元
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基于石墨烯的毒死蜱分子印迹电化学传感器的制备及对毒死蜱的测定
DOI: 10.11895/j.issn.0253-3820.140742, PP. 387-393
Keywords: 毒死蜱,石墨烯,分子印迹聚合物,电化学传感器,马来松香丙烯酸乙二醇酯
Abstract:
利用分子印迹技术,以马来松香丙烯酸乙二醇酯为交联剂,使用自由基热聚合法在石墨烯修饰的玻碳电极表面合成毒死蜱(CPF)分子印迹聚合膜,制得了CPF分子印迹电化学传感器。采用循环伏安法、线性扫描伏安法和电化学交流阻抗法等,考察了此CPF分子印迹膜的电化学性能。在最佳检测条件下,传感器的峰电流与CPF浓度在2.0×10-7-1.0×10-5mol/L范围内呈线性关系,线性方程为Ip(μA)=-7.1834-0.2424C(μmol/L),相关系数r2=0.9959,检出限为6.7×10-8mol/L(S/N=3)。构建了CPF分子印迹电化学传感器的动力学吸附模型,测得印迹传感器的印迹因子β=2.59,结合速率常数k=12.2324s。传感器表现出良好的重现性和稳定性,并成功用于实际水样和蔬菜样品中CPF的测定,加标回收率为94.1%-101.4%。
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