基于电化学活化的传感器构建及其电化学性能

为实现玻碳电极在电化学传感器领域的高灵敏度检测利用， 在pH=5.0的磷酸盐缓冲溶液中， 用恒电位法对玻碳电极进行电化学活化，考察pH值、富集电位及富集时间对Pb²⁺检测效果的影响, 并研究最佳实验条件下的活化电极对Pb²⁺的检测性能. 实验结果表明：该活化电极对Pb²⁺的电化学检测响应电流具有增强效果，并具有检测时间短、灵敏度高的特点；检测线性范围为1×10^-10~ 5×10^-6 mol/L，最低检出限和定量限分别为3×10^-11 mol/L和1.0×10^-10 mol/L. 该活化电极在自来水Pb²⁺的测定中具有较高回收率， 可用于实际水质检测.

Construction of Sensors Based on Electrochemical Activation and Its Electrochemical Performance

In order to realize the high sensitivity detection of glassy carbon electrode in the field of electrochemical sensors,  the glassy carbon electrode was electrochemically activated by constant potential method in phosphate buffer solution at pH=5.0. The effects of pH value,  accumulation potential and accumulation time on the detection effect of Pb²⁺ were investigated, and the detection performance of activated electrode for Pb²⁺ was investigated under the optimal experimental conditions. The experimental results show that the activated electrode can enhance the response current of electrochemical detection of Pb²⁺, and has the characteristics of short detection time and high sensitivity. The detection linear range of Pb²⁺ is 1×10^-10—5×10^-6 mol/L,  the minimum detection limit is 3×10^-11 mol/L,  and the limit of quantification is 1.0×10^-10 mol/L. The activated electrode has a high recovery in the determination of  Pb²⁺ in tap water, and can be used in the actual water quality detection.