聚溴酚蓝/壳聚糖修饰玻碳电极对抗坏血酸的电催化氧化作用  

Electrocatalytic oxidation of ascorbic acid by means of poly-bromophenol blue/chitosan modified glassy carbon electrode

作　　者：杨怀成[1] 孔波[2] 魏万之[2] 

机构地区：[1]桂林师范高等专科学校化学系,广西桂林541001 [2]湖南大学化学生物传感与计量学国家重点实验室,湖南长沙430082

出　　处：《化学试剂》2008年第9期665-668,共4页Chemical Reagents

基　　金：湖南大学化学生物传感与计量学国家重点实验室高等教育博士专项基金资助项目(20050532008)

摘　　要：在玻碳电极表面滴涂一层壳聚糖膜,吸附富集聚溴酚蓝介体,使其固定在电极表面,制备了聚溴酚蓝/壳聚糖玻碳修饰电极,研究了抗坏血酸在修饰电极上的电化学行为。实验结果表明,修饰电极对抗坏血酸具有良好的电催化氧化性能,在4.0×10^-6~1.0×10^-3mol/L范围内,抗坏血酸浓度与其循环伏安扫描峰电流呈良好的线性关系,相关系数为0.9993,检测限1.2×10^-6mol/L。该法测定药物中抗坏血酸的含量,结果满意。A poly bromophenol blue/chitosan modified glassy carbon electrode was fabricated in this paper. The glassy carbon electrode was firstly covered with a chitosan film, and then modified by electropolymeriztion bromophenol blue on the rough surface.The modified electrode had a perfect electro-catalytic effect on oxidation of aseorbic acid. The excellent electro-catalytic ac- tivity resulted in good characteristics such as a broad range of determination （4.0×10^-6~1.0×10^-3mol·L^-1, r = 0.999 3）, high sensitivity and stability.This method has been used to determine aseorbic acid in medicine with satisfaction result.

关 键 词：壳聚糖 溴酚蓝 抗坏血酸 电催化作用 

分 类 号：O646.5[理学—物理化学]