新型CMCS/WMCNTs修饰电极对槲皮素的电化学检测及应用  

Electrochemical detection and application of quercetin on a new CMCS/WMCNTs modified electrode

作　　者：张军丽[1] 张燕[1] 潘庆才[1] 

机构地区：[1]黄淮学院化学与制药工程学院,驻马店463000

出　　处：《化工新型材料》2017年第4期230-232,共3页New Chemical Materials

基　　金：河南省科技发展计划项目(132300410312);驻马店市科技发展计划项目(13604);黄淮学院青年骨干教师资助计划资助项目

摘　　要：研究了一种黄酮类物质槲皮素在新颖的多壁碳纳米管(WMCNTs)/羧甲基壳聚糖(CMCS)复合物修饰电极上的循环伏安行为。实验采用直接滴涂方法制备CMCS/WMCNTs修饰电极,在不同的pH、扫描速度、底液浓度、修饰材料等条件下通过循环伏安法来研究槲皮素在修饰电极上电化学行为。修饰电极与裸电极相比,峰电流有明显提升,表明修饰材料对槲皮素的电化学氧化还原行为有一定的催化增敏作用。槲皮素在pH=5.0的醋酸-醋酸钠(NaAc-HAc)缓冲溶液中有一对明显的氧化还原峰,电极过程为等量质子和电子参与的吸附控制过程,且还原峰电流与槲皮素浓度在(1.0×10^(-4)~1.0×10^(-3))mol/L范围内呈良好的线性关系。The voltammetric behavior of the flavonoid quercetin in a molecularly electrode,which was modified by multi-walled carbon nanotubes/carboxymethyl chitosan composite was studied.The electrochemical behavior of quercetin at the modified electrode was investigated by cyclic voltammetry at different pH,scanning speed,liquid concentration,and modified materials.Compared with the bare electrode and modified electrode,the peak current was improved significantly.The results showed that the modified materials had some catalytic sensitization effect on the electrochemical redox behavior of quercetin.Quercetin at pH=5.0in NaAc-HAc buffer solution had a pair of distinct redox peaks.The adsorption process was controlled by proton and electron.There was a good linear relationship between the reduction peak current and the concentration of quercetin in the range of 1.0×10^（-4）~1.0×10^（-3） mol/L.

关 键 词：槲皮素 WMCNTs CMCS 修饰电极 电化学 

分 类 号：O657.1[理学—分析化学]