title: Voltammetric Detection of Oxalic Acid by Using Glassy Carbon Electrodes with Covalently Attached Nitrogen-containing Functional Groups.
abstract: We report on a novel voltammetric detection of oxalic acid by using glassy carbon electrodes with covalently attached nitrogen-containing functional groups prepared by stepwise electrolysis. A glassy carbon electrode electrooxidized in an ammonium carbamate solution was electroreduced at -1.0 V (vs. Ag/AgCl) in 1.0 M sulfuric acid for a long time. We found that the electrocatalytic oxidation wave of oxalic acid obtained by this modified glassy carbon electrode was moved to a more negative potential region than that obtained by a platinum electrode in an acidic medium. A good linearity for the peak current signals was observed in the concentration range from 0.1 to 50 mM.
authors.affiliation: Department of Applied Chemistry, Graduate School of Engineering, Saitama Institute of Technology.
authors.forename: Hiroaki
authors.initials: H
authors.lastname: Matsuura
authors.forename: Syuhei
authors.initials: S
authors.lastname: Akabe
authors.forename: Tsubasa
authors.initials: T
authors.lastname: Kitamura
authors.forename: Takuto
authors.initials: T
authors.lastname: Takahashi
authors.forename: Shunichi
authors.initials: S
authors.lastname: Uchiyama
mesh_terms: D000586:Amination; D002244:Carbon / Q000737:chemistry*; D004563:Electrochemistry / Q000295:instrumentation*; D004566:Electrodes; D057230:Limit of Detection; D009584:Nitrogen / Q000737:chemistry*; D019815:Oxalic Acid / Q000032:analysis* / Q000737:chemistry*; D010084:Oxidation-Reduction; D013464:Sulfuric Acids / Q000737:chemistry
chemical_list: D013464:Sulfuric Acids; D002244:Carbon; D019815:Oxalic Acid; D009584:Nitrogen; C033158:sulfuric acid