Simultaneous detection of ascorbic acid and dopamine with electrochemically pretreated carbon nitride electrodes: Comparison with boron-doped diamond electrodes

Autor(es)

Medeiros, R. A. ^[1] ; Benchick, A. ^{[2, 3]} ; Rocha-Filho, R. C. ^[1] ; Fatibello-Filho, O. ^[1] ; Saidani, B. ^[3] ; Debiemme-Chouvy, C. ^[2] ; Deslouis, C. ^[2]

Afiliação do(s) autor(es)

^[1] Univ Fed Sao Carlos, Dept Quim, BR-13560970 Sao Carlos, SP - Brazil

^[2] Univ Paris 06, LISE UPR 15, CNRS, F-75005 Paris - France

^[3] Univ Abderrahmane MIRA Bejaia, LTMGP, Fac Technol, Dept Genie Proc, Bejaia - Algeria

• Tipo de documento: Artigo Científico
• Fonte: Electrochemistry Communications; v. 24, p. 61-64, OCT 2012.
• Citações Web of Science: 31

Resumo

Amorphous carbon nitride (a-CNx) electrodes were successfully tested as substitutes to boron-doped diamond (BDD) electrodes for the simultaneous voltammetric detection of dopamine (DA) and ascorbic acid (AA). For both materials, the same anodic pretreatment in alkaline medium was necessary to attain adequate and equivalent separation of the oxidation potential peaks. The electrochemical response of the a-CNx electrode in terms of peak current values and potentials was reproducible after each anodic pretreatment in alkaline medium. For BDD, DA oxidation was insensitive to anodic or cathodic pretreatments, whereas, for a-CNx, it was catalyzed by the anodic pretreatment. On the other hand, AA oxidation was catalyzed by the cathodic pretreatment for both electrodes. (C) 2012 Elsevier B.V. All rights reserved. (AU)

• Processo FAPESP: 11/00601-9 - Aplicação de eletrodos de diamante dopado com boro e de nitreto de carbono amorfo para a determinação simultânea de fármacos de diferentes grupos terapêuticos em formulações farmacêuticas e em urina
• Beneficiário: Roberta Antigo Medeiros
• Modalidade de apoio: Bolsas no Brasil - Pós-Doutorado