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Graphene Paste Electrode: Analytical Applications for the Quantification of Dopamine, Phenolic Compounds and Ethanol
Author(s) -
Gutierrez Fabiana,
Comba Fausto N.,
Gasnier Aurélien,
Gutierrez Alejandro,
Galicia Laura,
Parrado Concepción,
Rubianes María D.,
Rivas Gustavo A.
Publication year - 2014
Publication title -
electroanalysis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.574
H-Index - 128
eISSN - 1521-4109
pISSN - 1040-0397
DOI - 10.1002/elan.201400247
Subject(s) - graphene , ascorbic acid , chemistry , amperometry , ethanol , differential pulse voltammetry , polyphenol oxidase , voltammetry , phenols , electrode , chromatography , inorganic chemistry , cyclic voltammetry , organic chemistry , electrochemistry , materials science , nanotechnology , enzyme , food science , peroxidase
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.