基于纳米银-二氧化钛-壳聚糖复合物修饰电极的 芦丁电化学传感器的构建及其应用研究

本实验以Ag-TiO_2-CS纳米复合物修饰电极构建电化学传感器,建立适用于其分析检测的电化学分析新方法。利用Ag-TiO_2-CS修饰电极,以此制备芦丁电化学传感器。用循环伏安法(CV)对电极的电化学特性进行研究,之后用差分脉冲伏安法(DPV)对芦丁进行检测,建立芦丁的电化学检测新方法。CV实验表明Ag-TiO_2-CS纳米复合物具有良好的电化学活性,可以应用于芦丁检测。DPV实验进一步表明,修饰电极峰电流值与芦丁浓度在一定范围内呈线性关系,稳定性、抗干扰性等良好,此电化学传感器可以对芦丁片中的芦丁进行测定,结果良好。该传感器制作方法简单,灵敏度较高,稳定性好,可用于芦丁片中芦丁的分析测定。

CONSTRUCTION AND APPLICATION OF RUTIN ELECTROCHEMICAL SENSOR BASED ON Nano-silver-TiO2-Chitosan COMPLEX MODIFIED ELECTRODE

In this experiment,an electrochemical sensor was constructed by using Ag-TiO₂-CS nanocomposite modified electrode to establish a new method of electrochemical analysis suitable for the analyzing and detecting rutin wihich is a flavonoid extracted from plants and has anti-inflammatory,anti-radiation and anti-oxidation effects.The rutin electrochemical sensor was prepared by modifying the electrode with Ag-TiO₂-CS.The electrochemical characteristics of the electrode were studied by cyclic voltammetry (CV),the rutin was detected by differential pulse voltammetry (DPV) to establish a new electrochemical detection method for rutin.CV experiments showed that Ag-TiO₂-CS nanocomposites had good electrochemical activity and could be applied in rutin detection.DPV experiments further showed that the peak current values of the modified electrode were linear with the rutin concentration within a certain range.The electrochemical sensor with good stability and anti-interference can measure the rutin in the rutin tablet,and the result is good.The sensor has simple preparation method,high sensitivity and good stability,and can be used for the analysis and determination of rutin in rutin tablets.