Poly-0-aminophenol obtained at high potentials by cyclic voltammetry on sn0(2): F electrodes: Application in quantitative determination of ascorbic acid

• FRANCISCO ARMiJO ^[1] ; LUIS I CANALES ^[1] ; RODRIGO DEL RÍO ^[1] ; Mª ANGÉLICA DEL VALLE ^[1]
  1. [1] Pontificia Universidad Católica de Chile

     Pontificia Universidad Católica de Chile

     Santiago, Chile

     
• Localización: Journal of the Chilean Chemical Society (Boletín de la Sociedad Chilena de Química), ISSN-e 0717-6309, ISSN 0366-1644, Vol. 54, Nº. 2, 2009, págs. 158-162
• Idioma: inglés
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• Resumen

  • In the present work the obtention of poly-o-aminophenol (POAP) at high potentials on conducting glass (Sn0(2): F) is reported. The synthesis was carried out by continuous potential cycling in a 1 x 10-3M o-aminophenol (OAP), 0.1 M hydrochloric acid, and 0.1 M potassium chloride solution between-0.2 and 1.5 V at 0.05 V-s-1 vs Ag | AgC1. The polymer growth was followed by cyclic voltammetry, UV-vis spectra, and AFM characterization. The SnO2: F modified electrode (SnO2: F/POAP) was tested in the electro-oxidation of ascorbic acid (AA) in phosphate buffer solution. This coating showed an important electrocatalytic effect because a negative anodic shift of 0.4 V with respect to abare SnO2: F glass electrode was observed.