对乙酰氨基酚在碳纳米管-铜钴合金修饰电极上的准可逆响应及其分析应用  

Quasi-Reversible Electrochemical Response of Acetaminophen at Carbon Nanotubes-Copper-Cobalt Alloy Modified Electrode and Its Application

作　　者：石恩永 崔文林 佘雨 刘传银[1] SHI En-yong;CUI Wen-lin;SHE Yu;LIU Chuan-yin(School of Chemical Engineering,Hubei University of Arts and Science,Xiangyang 441053)

机构地区：[1]湖北文理学院化学工程学院

出　　处：《分析科学学报》2019年第5期592-596,共5页Journal of Analytical Science

基　　金：湖北文理学院“双百行动计划”项目;校级大学生梦想基金项目

摘　　要：在玻碳电极(GCE)表面修饰碳纳米管(CNTs)后,继续在碳纳米管修饰电极上电沉积Cu-Co合金,制备了Cu-Co-CNTs/GCE。该电极上对乙酰氨基酚在pH=7的磷酸盐缓冲溶液中的氧化还原峰电位差仅为45 mV,根据计算可以确定为准可逆反应。探究了底液、电沉积圈数、pH、扫速对对乙酰氨基酚的影响。该电极上对乙酰氨基酚的电化学响应电流与其浓度在0.5~115.0μmol/L之间呈现良好的线性关系,检出限为1.0×10-7 mol/L。该电极具有良好的稳定性和重现性,用于感冒药及模拟样品中对乙酰氨基酚的检测,结果较好。Carbon nanotubes(CNTs) was modified onto glassy carbon electrode(GCE), and then copper-cobalt was further electro-deposited onto CNTs/GCE to form Cu-Co-CNTs/GCE. The redox peak potential separation of acetaminophen is only 45 mV in phosphate buffe(pH=7) at Cu-Co-CNTs/GCE. Based on the calculated constant, it is deduced that the electrochemical response of acetaminophen is a quasi-reversible process at the proposed electrode. Some conditions including electrolyte, optimum pH value and suitable scan rates have been optimized for the determination of acetaminophen. Under optimum conditions, the oxidation current is linear to its concentration from 0.5 to 115.0 μmol/L with a detection limit of 0.1 μmol/L. The proposed method has been used to detect simulated and real samples with satisfactory results.

关 键 词：对乙酰氨基酚 铜钴合金-碳纳米管 准可逆响应 

分 类 号：O657.1[理学—分析化学]