四氰基醌二甲烷修饰碳糊电极电催化氧化测定抗坏血酸  

Tetracyanoquinodimethane Modified Carbon Paste Electrodes for Oxidation of Ascorbic Acid

作　　者：刘宝红[1] 陈蕾[1] 刘海鹰[1] 邓家祺[1] 

机构地区：[1]复旦大学化学系,上海200433

出　　处：《分析化学》1995年第2期206-210,共5页Chinese Journal of Analytical Chemistry

基　　金：国家自然科学基金;长春应用化学研究所电分析开放实验室资助课题

摘　　要：本文用四氰基醌二甲烷(Tetracyanoquinodimethane)(TCNQ)作价体,制成 TCNQ-碳糊电极,研究了该电极的性能。电极对水溶液中的抗坏血酸(AH_2)在较宽的PH和浓度范围内均有良好的电催化氧化作用,电极的稳定性良好,在AH_2浓度5.0×10(-5)～5.0×10～(-2)mol/L范围内,催化峰电流与AH_2浓度呈线性关系,响应时间小于 30s。A tetracyaroquinodimethane (TCNQ) modified carbon paste electrode for the specific determination of ascorbic acid(AH2) was described. Its electrocatalytic behaviour was investigated. The electrode has good electrooxidation of AH2 in a wide range of pH,and responded linearly to ascorbic acid of 5. 0 X 1(T5-5. 0 10-2mol/L, in less than 30 . The method is satisfactorily applied to the determination of AH2 in medicines.

关 键 词：碳糊电极 TCNQ 催化 氧化 维生素C 

分 类 号：R977.23[医药卫生—药品] O657.14[医药卫生—药学]