INFIQC   05475
INSTITUTO DE INVESTIGACIONES EN FISICO- QUIMICA DE CORDOBA
Unidad Ejecutora - UE
artículos
Título:
Graphene paste electrode: analytical application for the quantification of dopamine and ethanol
Autor/es:
F. A. GUTIERREZ; FAUSTO N. COMBA; AURELIEN GASNIER; ALEJANDRO GUTIERREZ; MARÍA D. RUBIANES ; G. A. RIVAS
Revista:
ELECTROANALYSIS
Editorial:
WILEY-V C H VERLAG GMBH
Referencias:
Lugar: Weinheim; Año: 2014 vol. 26 p. 1694 - 1701
ISSN:
1040-0397
Resumen:
This work reports the analytical applications of a graphene paste electrode (GrPE) for the quantification of dopamine, ethanol and phenolic compounds. Dopamine was detected by differential pulse voltammetry-adsorptive stripping with medium exchange at submicromolar levels even in the presence of high excess of ascorbic acid and serotonin. The electrocatalytic activity of graphene towards the oxidation of NADH and the reduction of quinones allowed the sensitive amperometric determination of ethanol and phenols using GrPE modified with alcohol dehydrogenase/NAD+ or polyphenol oxidase, respectively, with successful applications in real samples like alcoholic beverages and tea.