title: Amperometric Determination of Ascorbic Acid on an Au Electrode Modified by a Composite Film of Poly(3,4-ethylenedioxythiophene) and Superconductive Carbon Black.
abstract: A new composite film-modified electrode was prepared by the electropolymerisation of poly(3,4-ethylenedioxythiophene) (PEDOT) and superconductive carbon black (SCB) on a gold electrode. The PEDOT-SCB/Au electrode exhibited excellent ability towards the electrocatalytic oxidation of ascorbic acid, in terms of a 480 mV shift of the oxidation potential in the negative direction, and a dramatically enhanced oxidation current. Under the optimum conditions, the amperometric detection of ascorbic acid provided a wide linear detection range from 1.0 × 10(-7) to 8.0 × 10(-4) M, and a detection limit of 5.0 × 10(-8) M (S/N = 2) as well as good reproducibility and stability.
authors.affiliation: School of Environmental and Chemical Engineering, Tianjin Polytechnic University.
authors.forename: Xinfei
authors.initials: X
authors.lastname: Zhou
authors.forename: Kunyun
authors.initials: K
authors.lastname: He
authors.forename: Yu
authors.initials: Y
authors.lastname: Wang
authors.forename: Haitao
authors.initials: H
authors.lastname: Zheng
authors.forename: Shin-ichiro
authors.initials: S
authors.lastname: Suye
mesh_terms: D001205:Ascorbic Acid / Q000032:analysis*; D019086:Bridged Bicyclo Compounds, Heterocyclic / Q000737:chemistry*; D002384:Catalysis; D004553:Electric Conductivity; D055664:Electrochemical Techniques; D004566:Electrodes; D006046:Gold / Q000737:chemistry*; D010084:Oxidation-Reduction; D011108:Polymers / Q000737:chemistry*; D053260:Soot / Q000737:chemistry*
chemical_list: D019086:Bridged Bicyclo Compounds, Heterocyclic; D011108:Polymers; D053260:Soot; C121383:poly(3,4-ethylene dioxythiophene); D006046:Gold; D001205:Ascorbic Acid