抗坏血酸在β-环糊精/聚苯胺修饰玻碳电极上的电化学行为  

Electrochemical Property of Ascorbic Acid atβ-Cyclodextrin/Polyaniline Modified Glassy Carbon Electrode

作　　者：常竹[1] 高亚盟 徐茂田[1] 

机构地区：[1]商丘师范学院化学化工学院,商丘476000 [2]华东师范大学化学系,上海200062

出　　处：《理化检验（化学分册）》2015年第7期966-969,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(21105062;21175091)

摘　　要：研究了抗坏血酸在β-环糊精/聚苯胺修饰玻碳电极上的电化学行为。采用电聚合方法制备了β-环糊精/聚苯胺修饰玻碳电极,在聚苯胺和β-环糊精的协同作用下,电极对抗坏血酸具有显著的催化氧化作用。抗坏血酸浓度在1.0×10^-6-1.0×10^-4 mol·L-1范围内与其氧化峰电流呈线性关系,检出限（3S/N）为8.1×10^-7 mol·L^-1。对5.0×10^-6 mol·L^-1的抗坏血酸溶液连续测定6次,测定值的相对标准偏差为0.21%。该方法选择性和重复性好,可在多巴胺存在下选择性测定抗坏血酸。The electrochemical property of ascorbic acid atβ-cyclodextrin/polyaniline modified glassy carbon electrode was studied. The β-cyclodextrin/polyaniline modified glassy carbon electrode was perpared by electropolymerization method.The modified electrode had excellent catalytic oxidation effects to ascorbic acid due to the synergy of polyaniline andβ-cyclodextrin.Linear relationship between values of oxidation peak current and concentration of ascorbic acid was found in the range of 1.0×10^-6-1.0×10^-4 mol·L^-1 with detection limit（3S/N）of 8.1 ×10^-7 mol·L^-1.The precision of the method was tested at 5.0×10^-6 mol·L^-1 ascorbic acid solution for 6replicates,with RSD of 0.21%.The proposed method exhibited good selectivity and reproducibility,and it was applicable for selective determination of ascorbic acid in the presence of dopamine.

关 键 词：差分脉冲伏安法 Β-环糊精 修饰电极 抗坏血酸 聚苯胺 

分 类 号：O657.14[理学—分析化学]