Detection of aniline at boron-doped diamond electrodes with cathodic stripping voltammetry

Boron-doped diamond (BDD) electrodes were used to investigate the possibility of detecting aniline by linear-sweep cathodic stripping voltammetry. It was found that the dimeric species ( p-aminodiphenylamine and benzidine) formed by anodic oxidation of aniline during the accumulation period are invo...

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Bibliographic Details
Published in:Talanta (Oxford) 2007-09, Vol.73 (2), p.404-406
Main Authors: Spătaru, Tanţa, Spătaru, Nicolae, Fujishima, Akira
Format: Article
Language:English
Subjects:
Analytical chemistry
Aniline detection
Boron-doped diamond
Cathodic stripping voltammetry
Chemistry
Electrochemical methods
Exact sciences and technology
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Summary:Boron-doped diamond (BDD) electrodes were used to investigate the possibility of detecting aniline by linear-sweep cathodic stripping voltammetry. It was found that the dimeric species ( p-aminodiphenylamine and benzidine) formed by anodic oxidation of aniline during the accumulation period are involved in electrochemically reversible redox processes and, in acidic media, the shape of the stripping voltammetric response is suitable for aniline detection in the micromolar concentration range. The low background current of conductive diamond is an advantage compared to other electrode materials and allows a detection limit of 1 μM. Weak adsorption properties and the extreme electrochemical stability are additional advantages of BDD and it was found that, even after long-time measurements, the electrode surface can regain its initial activity by an anodic polarization in the potential region of water decomposition.
ISSN:0039-9140
1873-3573
DOI:10.1016/j.talanta.2007.03.056