Lead Determination on MWNT/Nafion Composite Modified Glassy Carbon Electrodes

作     者：XU, Qin LIU, Ni-Na ZHU, Jun-Jie 

作者机构：Key Labororatory of Analytical Chemistry for Life Science Department of Chemistry Nanjing University Nanjing Jiangsu 210093 China 

出 版 物：《Chinese Journal of Chemistry》 (中国化学（英文版）)

年 卷 期：2005年第23卷第11期

页      面：1510-1514页

核心收录：

学科分类：081704[工学-应用化学] 08[工学] 0817[工学-化学工程与技术] 

基　　金：Project supported by the National Natural Science Foundation'of China (Nos. 20325516 and 90206037) and the Foundation of State Key Laboratory of Electroanalytical Chemistry from Changchun Institute of Applied Chemistry 

主　　题：composite lead electrochemistry differential pulsed voltammetry 

摘      要：A composite material of nitric acid oxidized multiwalled carbon nanotube （MWNT） and Nation was prepared. Such composite was modified on a glassy carbon electrode to determine trace of lead by differential pulsed voltammetry. In pH=6.47 NaNO3 solution, Pb^2＋ ions were accumulated on the modified electrode at -0.4 V. Compared with a bare and a Nation film coated electrode, the composite coated GC electrode can reduce the accumulating potential and eliminate the toxic character of mercury. The calibration plots were linear at low concentration of 5.0× 10^-9-2.0× 10^-8 mol/L and high concentration of 2.5× 10^-8-5.0× 10^-6 mol/L. The performances characteristics indicate that the electrode can be used to determine trace Pb^2＋ ions.