Graphene Paste Electrode: Analytical Applications for the Quantification of Dopamine, Phenolic Compounds and Ethanol

This work reports the analytical applications ofa graphene paste electrode (GrPE) for the quantificationof dopamine, ethanol and phenolic compounds. Dopa-mine was detected by differential pulse voltammetry-ad-sorptive stripping with medium exchange at submicromo-lar levels even in the presence of high excess of ascorbicacid and serotonin. The electrocatalytic activity of graphene towards the oxidation of NADH and the reductionof quinones allowed the sensitive amperometric determi-nation of ethanol and phenols using GrPE modified withalcohol dehydrogenase/NAD+or polyphenol oxidase, re-spectively, with successful applications in real sampleslike alcoholic beverages and tea.

Palabras clave: Graphene Paste Electrode , Composite Electrodes , Ascorbic Acid , Dopamine , Nadh , Enzymatic Biosensors , Phenolbiosensor , Ethanol Biosensor , Polyphenol Oxidase , Alcohol Dehydrogenase

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Excepto donde se diga explícitamente, este item se publica bajo la siguiente descripción: Creative Commons Attribution-NonCommercial-ShareAlike 2.5 Unported (CC BY-NC-SA 2.5)

Identificadores

URI: http://hdl.handle.net/11336/31496

DOI: http://dx.doi.org/10.1002/elan.201400247

URL: http://onlinelibrary.wiley.com/doi/10.1002/elan.201400247/abstract

Colecciones

Articulos(INFIQC)
Articulos de INST.DE INVESTIGACIONES EN FISICO- QUIMICA DE CORDOBA

Citación

Rivas, Gustavo Adolfo; Rubianes, María Dolores; Parrado, Concepción; Galicia, Laura; Gutierrez, Fabiana Andrea; Gasnier, Aurelien; et al.; Graphene Paste Electrode: Analytical Applications for the Quantification of Dopamine, Phenolic Compounds and Ethanol; Wiley VCH Verlag; Electroanalysis; 26; 8; 8-2014; 1694-1701

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