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Sensors 2013, 13(10), 14029-14040; doi:10.3390/s131014029

Simultaneous Determination of Dopamine, Serotonin and Ascorbic Acid at a Glassy Carbon Electrode Modified with Carbon-Spheres

Laboratory of Optical Probes and Bioelectrocatalysis (LOPAB), Key Laboratory of Chemo/Biosensing, Anhui Province, College of Chemistry and Materials Science, Anhui Normal University, Wuhu 241000, China,
Department of Pharmacy, Anhui Medical College, Hefei 230601, China
College of Chemistry and Chemical Engineering, Fuyang Teachers College, Fuyang 236041, China
Department of Chemistry and Food Science, Chizhou College, Chizhou 247000, China
Author to whom correspondence should be addressed.
Received: 7 September 2013 / Revised: 6 October 2013 / Accepted: 12 October 2013 / Published: 16 October 2013
(This article belongs to the Section Chemical Sensors)
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A novel glassy carbon electrode (GCE) modified with carbon-spheres has been fabricated through a simple casting procedure. The modified GCE displays high selectivity and excellent electrochemical catalytic activities towards dopamine (DA), serotonin (5-HT), and ascorbic acid (AA). In the co-existence system, the peak separations between AA and DA, DA and 5-HT, and AA and 5-HT are large up to 230, 180, and 410 mV, respectively. Differential pulse voltammetry (DPV) has been employed to simultaneously detect DA, 5-HT, and AA, and the linear calibration curves for DA, 5-HT, and AA are obtained in the range of 20.0–150.0 μM, 40.0–750.0 μM and 300.0–2,000.0 μM with detection limits (S/N = 3) of 2.0 μM, 0.7 μM and 0.6 μM, respectively. The proposed electrode has been applied to detect DA, 5-HT, and AA in real samples using standard addition method with satisfactory results. View Full-Text
Keywords: carbon-spheres; simultaneous determination; dopamine; ascorbic acid; serotonin carbon-spheres; simultaneous determination; dopamine; ascorbic acid; serotonin

This is an open access article distributed under the Creative Commons Attribution License (CC BY 3.0).

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MDPI and ACS Style

Zhou, J.; Sheng, M.; Jiang, X.; Wu, G.; Gao, F. Simultaneous Determination of Dopamine, Serotonin and Ascorbic Acid at a Glassy Carbon Electrode Modified with Carbon-Spheres. Sensors 2013, 13, 14029-14040.

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