Skip to the main content

Croatica Chemica Acta, Vol. 89 No. 3, 2016.

Original scientific paper

https://doi.org/10.5562/cca2679

Sensitive Electrochemical Detection of Dopamine With a Nitrogen-doped Graphene Modified Glassy Carbon Electrode

Wencheng Wang ; Key Laboratory of Tropical Medicinal Plant Chemistry of Ministry of Education, College of Chemistry and Chemical Engineering, Hainan Normal University, Haikou 571158, P. R. China
Shixing Gong ; College of Materials Science and Engineering, Qingdao University of Science and Technology, Qingdao 266042, P. R. China
Wei Sun orcid id orcid.org/0000-0002-9923-7328 ; Key Laboratory of Tropical Medicinal Plant Chemistry of Ministry of Education, College of Chemistry and Chemical Engineering, Hainan Normal University, Haikou 571158, P. R. China
Guangjiu Li ; College of Materials Science and Engineering, Qingdao University of Science and Technology, Qingdao 266042, P. R. China
Yaping Lu ; College of Materials Science and Engineering, Qingdao University of Science and Technology, Qingdao 266042, P. R. China
Jianhua Yu ; College of Materials Science and Engineering, Qingdao University of Science and Technology, Qingdao 266042, P. R. China
Lifeng Dong ; College of Materials Science and Engineering, Qingdao University of Science and Technology, Qingdao 266042, P. R. China

Full text: english pdf 1.219 Kb

page 323-330

downloads: 2.290

cite

Abstract

In this paper nitrogen-doped graphene (NG) nanosheets were used as the modifier on the surface of glassy carbon electrode (GCE). The modified electrode (NG/GCE) was further applied to the sensitive detection of dopamine (DA) by voltammetric method. Due to the unique properties of NG such as large surface area and excellent electrocatalytic activity, electrochemical response of DA was greatly enhanced on NG/GCE with a pair of well-defined redox peaks appeared on cyclic voltammogram. Electrochemical behaviors of DA on NG/GCE were carefully investigated with the electrochemical parameters calculated. Under the selected conditions the oxidation peak currents of DA had a good linear relationship with its concentration in the range from 8.0×10–7 mol L–1 to 8.0×10–4 mol L–1 with a detection limit of 2.55×10–7 mol L–1 (3σ). The proposed method was further applied to the DA injection samples determination with satisfactory results.

This work is licensed under a Creative Commons Attribution 4.0 International License.

Keywords

nitrogen-doped graphene; glassy carbon electrode; dopamine; electrochemistry

Hrčak ID:

170351

URI

https://hrcak.srce.hr/170351

Publication date:

28.9.2016.

Visits: 3.154 *