摘要
研究了拉莫三嗪在玻碳电极上的电化学修饰及其修饰电极的电化学行为。在H2SO4介质中，采用循环伏安法制备了聚拉莫三嗪膜修饰玻碳电极（PLTG／GCE），用交流阻抗技术对修饰层进行表征。研究发现，该电极对NO2^-具有明显的电催化氧化作用和灵敏的电流响应，NO2^-的氧化峰电流与其浓度在9．6×10^-6～1．1×10^-3mol·L^-1范围内呈良好的线性关系，相关系数（r）为0．9988，检出限为3．2×10^-6mol·L^-1该方法用于实际水样中NO2^-含量的测定，结果满意。
A glassy carbon electrode modified with poly-lamotrigine film （PLTG/GCE） was fabricated. The poly-lamotrigine film was deposited at the glassy carbon electrode by cyclic voltammetry in H2SO4 solution. The electrode was characterized by alternating current （AC） impedance. NO2^- was determined by the differential pulse voltammetry （DPV） using the electrode in KH2PO4 and Na2 HPO4 buffer solution. The modified electrode exhibited good electrocatalytic response to the oxidation of nitrite. A good linear relationship was obtained between the anodic peak currents and NO2^- concentrations in the range of 9.6×10^-6-1.1×10^-3 mol · L^-1 （correlation coefficient r =0. 998 8） with a detection limit of 3.2 ×10^-6 mol · L^-1. The proposed method was applied for the determination of NO^2- in real water samples with satisfactory results.
出处
《分析测试学报》
CAS
CSCD
北大核心
2011年第2期181-185,共5页
Journal of Instrumental Analysis
基金
国家自然科学基金资助项目(20975091)
2010年江苏省大学生实践创新基金资助项目(2010-470)
关键词
聚拉莫三嗪膜
玻碳电极
NO2-
电催化
poly-lamotrigine film
glassy carbon electrode
NO2^-
electrocatalysis
