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以铜离子为模板,多巴胺为功能单体,采用电聚合法在石墨烯修饰碳电极表面成功制备对铜离子有高选择性和灵敏性的印迹电化学传感器。采用差分脉冲伏安法和循环伏安法对该印迹传感器的电化学行为进行详细研究。在优化检测条件下,该印迹电化学传感器的响应电流与铜离子浓度的负对数在5.0×10~(-6)~5.0×10~(-11)mol/L浓度范围内呈良好的线性关系,最低检测限为1.0×10~(-11)mol/L。该印迹电化学传感器成功用于实际水样中的微量铜离子分析。
Using copper ion as a template and dopamine as a functional monomer, an imprinted electrochemical sensor with high selectivity and sensitivity to copper ions was successfully prepared on the surface of graphene modified carbon electrode by electropolymerization. The differential pulse voltammetry and cyclic voltammetry were used to study the electrochemical behavior of the imprinted sensor. Under the optimal conditions, the negative logarithm of the response current and copper ion concentration of the imprinted electrochemical sensor showed a good linearity in the range of 5.0 × 10 -6 ~ 5.0 × 10 ~ (-11) mol / L The minimum detection limit is 1.0 × 10 ~ (-11) mol / L. The imprinted electrochemical sensor has been successfully used for trace copper ion analysis in actual water samples.