OALib Journal期刊
联苯胺分子印迹聚合物零流电位法传感器的制备及其应用
DOI: 10.11895/j.issn.0253-3820.150052
Keywords: 联苯胺 ,分子印迹聚合物 ,零流电位法 ,石墨烯
Abstract:
考察了在石墨烯修饰的铅笔芯电极(G-PEC)表面制备联苯胺分子印迹聚合物(BZ-MIP)的电聚合参数以及模板分子从印迹聚合物中去除的洗脱时间对BZ-MIP与BZ结合前后零流电位响应差值的影响,优化了最佳制备条件;计算出联苯胺及与其结构相近的4-氨基偶氮苯、4-氯苯胺、4-氨基联苯和单偶氮染料胭脂红在BZ-MIP上的印迹容量分别为0.632,0.1123,0.1123,0.0847和0.0725。实验结果表明,本方法制备的BZ-MIP对联苯胺特异识别性和选择性良好,其它物质不干扰模板分子与印迹聚合物印迹位点的结合。在联苯胺4×10-8-1×10-5mol/L浓度范围内,BZ-MIP与BZ结合前后的零流电位差与其浓度对数呈正比,检出限为1.89×10-8mol/L,基于此制备出检测联苯胺的BZ-MIP-G-PEC零流电位传感器。应用此传感器检测实际样品,回收率为95.7%-104.2%。
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