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

Sensors

Jianqing Zhou¹  Meili Sheng¹  Xueyue Jiang¹  Guozhi Wu¹ 

[1] 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; E-Mails:

关键词: carbon-spheres;    simultaneous determination;    dopamine;    ascorbic acid;    serotonin;   

DOI  :  10.3390/s131014029

来源: mdpi

【 摘 要 】

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.

【 授权许可】

CC BY   
© 2013 by the authors; licensee MDPI, Basel, Switzerland.