ELECTROCHEMICAL DETERMINATION OF DOPAMINE WITH GRAPHENE-MODIFIED GLASSY CARBON ELECTRODES

Árpád Ferenc  SZŐKE; Graziella Liana  TURDEAN; Gabriel  KATONA; Liana Maria  MUREŞAN

ELECTROCHEMICAL DETERMINATION OF DOPAMINE WITH GRAPHENE-MODIFIED GLASSY CARBON ELECTRODES

Authors

Árpád Ferenc SZŐKE Babeş-Bolyai University, Faculty of Chemistry and Chemical Engineering, Department of Chemistry and Chemical Engineering of the Hungarian Line. Email: arpad.szoke@ubbcluj.ro. https://orcid.org/0000-0001-6807-5568
Graziella Liana TURDEAN Faculty of Chemistry and Chemical Engineering, Research Center of Electrochemistry and Nonconventional Materials, Babeş-Bolyai University, Cluj-Napoca, Romania. Email: gturdean@chem.ubbcluj.ro. https://orcid.org/0000-0003-1273-6878
Gabriel KATONA Department of Chemistry and Chemical Engineering of Hungarian Line of Study, Faculty of Chemistry and Chemical Engineering, Babeş-Bolyai University, Cluj-Napoca, Romania. Email: gabik@chem.ubbcluj.ro. https://orcid.org/0000-0003-3508-0023
Liana Maria MUREŞAN Department of Chemical Engineering, Faculty of Chemistry and Chemical Engineering, Babeş-Bolyai University, Cluj-Napoca, Romania. Email: limur@chem.ubbcluj.ro. https://orcid.org/0000-0002-2891-2947

Keywords:

graphene oxide, reduced graphene oxide, dopamine, cyclic voltammetry, square wave voltammetry

Abstract

Two new glassy carbon modified electrodes were prepared by drop casting of chemically reduced graphene oxide (rGO) or graphene oxide (GO) on glassy carbon (GC) and then protected with a polymeric layer of Nafion or chitosan (Chit) (GC/Chit/rGO/Chit and GC/GO/Nafion). Their investigation by cyclic- and square-wave voltammetry for dopamine (DA) oxidation was aiming to estimate the analytical parameters that have the best values for GC/Chit/rGO/Chit electrode (i.e., the highest sensitivity of 1.002 ± 0.025 μA/ μM, a detection limit of 2.67 µM μM, for a linear domain from 4 to 18 µM DA). The modified GC/Chit/rGO/Chit electrode was also used for the detection of dopamine in injection vials using the standard addition method with a recovery of 99.42%.

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STUDIA UBB CHEMIA, Volume 61 (LXI), No. 3, September 2016

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Published

2016-09-30

How to Cite

SZŐKE, Árpád F. ., TURDEAN, G. L. ., KATONA, G. ., & MUREŞAN, L. M. . (2016). ELECTROCHEMICAL DETERMINATION OF DOPAMINE WITH GRAPHENE-MODIFIED GLASSY CARBON ELECTRODES. Studia Universitatis Babeș-Bolyai Chemia, 61(3), 135–144. Retrieved from https://studia.reviste.ubbcluj.ro/index.php/chemia/article/view/8339