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

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

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 hig...

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Veröffentlicht in:Electroanalysis (New York, N.Y.) N.Y.), 2014-08, Vol.26 (8), p.1694-1701
Hauptverfasser: Gutierrez, Fabiana, Comba, Fausto N., Gasnier, Aurélien, Gutierrez, Alejandro, Galicia, Laura, Parrado, Concepción, Rubianes, María D., Rivas, Gustavo A.
Format: Artikel
Sprache:eng
Schlagworte:
Alcohol dehydrogenase
Ascorbic acid
Composite electrodes
Dopamine
Electrodes
Enzymatic biosensors
Ethanol
Ethanol biosensor
Ethyl alcohol
Graphene
Graphene paste electrode
Mathematical analysis
NADH
Pastes
Phenol biosensor
Polyphenol oxidase
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Zusammenfassung: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.
ISSN:1040-0397
1521-4109
DOI:10.1002/elan.201400247