对氨基苯酚在L-半胱氨酸修饰金电极上的电化学行为及其在分析中的应用  

Electrochemical Behavior of p-Aminophenol at L-Cysteine Modified Gold Electrode and Its Analytical Application

作　　者：宋远志[1] 

机构地区：[1]江苏省低维功能材料重点建设实验室,淮阴师范学院化学系,淮安223300

出　　处：《理化检验（化学分册）》2008年第10期986-988,993,共4页Physical Testing and Chemical Analysis(Part B:Chemical Analysis)

基　　金：国家自然科学基金资助项目(20302002);江苏省教育厅自然科学基金资助项目(04KJD150038);江苏省低维功能材料重点建设实验室开放课题资助项目(JSKC6031)

摘　　要：在金电极上组装了L-半胱氨酸,采用循环伏安法研究了对氨基苯酚在L-半胱氨酸修饰金电极上的电化学行为。结果表明:在pH 6.54的磷酸盐缓冲介质中,扫描速率为100 mV.s-1时,L-半胱氨酸修饰金电极上对对氨基苯酚具有良好的电催化活性,并显示对氨基苯酚在此修饰电极上的反应过程与裸金电极相比有良好的可逆性。将此优化的反应条件,应用于测定饮用水中对氨基苯酚的含量。对电催化机理也作了简要探讨。Assembling of L-cysteine on gold electrode was described. Electrochemical behavior of p-aminophenol at L-cysteine modified gold electrode was studied by cyclic voltammetry. It was found that in a phosphate medium of pH 6. 54, and using the scanning rate of 100 mV · s^-1 , better reversibility of the electrode reaction of p-aminophenol at the L-cysteine modified gold electrode was obtained as compared with the bare gold electrode, and that significant electrocatalytic activity of the modified electrode toward the reaction of p-aminophenol was observed. Condition of this electrochemical reaction was optimized and the method was applied to the determination of p-aminophenol in drinking water by measuring the oxidative peak current with the linear scanning method. A brief discussion on the mechanism of the electrocatalysis was given.

关 键 词：循环伏安法 L-半胱氨酸 对氨基苯酚 金电极 

分 类 号：O657.31[理学—分析化学]