DNA-碳纳米管/聚苯胺复合膜选择性测定多巴胺  

DNA-SWCNTs/PANI composite film for selectivity detection dopamine

作　　者：刘晓颖[1] 兰国华[1] 曾宪冬[1] 古君平[1] 魏万之[1] 

机构地区：[1]湖南大学化学生物传感与计量学国家重点实验室化学化工学院,湖南长沙410082

出　　处：《化学传感器》2009年第4期43-47,共5页Chemical Sensors

基　　金：教育部博士点基金(20060532006)

摘　　要：构建了DNA-碳纳米管／聚苯胺复合膜修饰的玻碳电极，研究了抗坏血酸（AA）存在下多巴胺（DA）在该修饰电极上的电化学行为．发现DNA-碳纳米管／聚苯胺复合膜对多巴胺有明显的电催化作用。在0．1mol/L磷酸缓冲溶液（pH7．0）中，用方波伏安法（SWV）测得氧化峰电流与DA浓度在0．1～30×10-5mol／L范围内呈良好的线性关系。该修饰电极用于样品DA的检测，结果满意：DNA-SWCNTs/PANI composite film modified glassy carbon electrode was fabricated. The electrochem- ical behavior of dopamine （DA） at the modified electrode in the presence of ascorbic acid （AA） was studied. It was found that DNA-SWCNTs/PANI composite film showed an obvious electrocatalytic activity for the oxidation of DA. The peak current was good proportional to the concentration of DA over the range 0.1-30 × 10-5 mol/L in 0.1 mol/L phosphate buffer solutin（pH7.0）. The modified electrode was used to detection sampale DA with a satisfactory result.

关 键 词：聚苯胺 单壁碳纳米管 DNA 多巴胺 

分 类 号：R91[医药卫生—药学]