Autor según el artículo: Parrilla M; Cánovas R; Andrade FJ

Departamento: Química Analítica i Química Orgànica

e-ISSN: 1521-4109

Autor/es de la URV: Andrade, Francisco Javier

Palabras clave: Potentiometric sensors Nafion ion-exchange membrane Hydrogen peroxide Donnan potential

Resumen: The potentiometric response to hydrogen peroxide of a platinum electrode coated with a layer of Nafion is presented. The results show that the Nafion membrane acts as an effective permselective barrier, thus significantly reducing the response to some redox active species, such as ascorbate. Even more interesting, these coated electrodes show a significantly enhanced sensitivity to hydrogen peroxide (H2O2) when the measurements are performed in solutions of high ionic strength. The influence of pH, ionic strength and supporting electrolyte on this enhancement are presented. Under optimized conditions these coated electrodes show a linear dependence with the logarithm of the concentration of H2O2, with sensitivities of −125.1±5.9 mV decade−1 (several times higher than the bare electrodes) and a linear range that spans from 10−5 M to 10−3 M of H2O2. Preliminary studies suggest that the coupling between the redox potential on the Pt electrode and the Donnan potential of the membrane plays a role on this enhancement. Considering this improved sensitivity, selectivity, stability and linear ranges, this system shows promise as a future platform to build enzyme-based potentiometric biosensors.

Áreas temáticas: Saúde coletiva Química Psicología Medicina ii Medicina i Materiais Interdisciplinar Geociências Farmacia Engenharias iii Engenharias ii Electrochemistry Ciências biológicas ii Ciências biológicas i Ciências ambientais Ciências agrárias i Chemistry, analytical Biotecnología Biodiversidade Astronomia / física Analytical chemistry

Acceso a la licencia de uso: https://creativecommons.org/licenses/by/3.0/es/

Direcció de correo del autor: franciscojavier.andrade@urv.cat

Identificador del autor: 0000-0003-1199-2837

Fecha de alta del registro: 2023-02-18

Versión del articulo depositado: info:eu-repo/semantics/acceptedVersion

Enlace a la fuente original: https://onlinelibrary.wiley.com/doi/abs/10.1002/elan.201600403

URL Documento de licencia: http://repositori.urv.cat/ca/proteccio-de-dades/

Referencia al articulo segun fuente origial: Electroanalysis. 29 (1): 223-230

Referencia de l'ítem segons les normes APA: Parrilla M; Cánovas R; Andrade FJ (2017). Enhanced Potentiometric Detection of Hydrogen Peroxide Using a Platinum Electrode Coated with Nafion. Electroanalysis, 29(1), 223-230. DOI: 10.1002/elan.201600403

DOI del artículo: 10.1002/elan.201600403

Entidad: Universitat Rovira i Virgili

Año de publicación de la revista: 2017

Tipo de publicación: Journal Publications