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Citation: YANG Chun-Hai, ZHANG Sheng-Hui, LIU Ying-Xuan, HUANG Wen-Sheng. Electrochemical Behavior of Ofloxacin at Carbon Nanotubes Film Electrode and Its Voltammetric Determination[J]. Chinese Journal of Applied Chemistry, ;2007, 24(5): 540-545. shu

Electrochemical Behavior of Ofloxacin at Carbon Nanotubes Film Electrode and Its Voltammetric Determination

1.
a Department of Chemistry, Hubei Institute for Nationalities, Enshi 445000;
2.
b College of Chemistry and Molecular Science, Wuhan University, Wuhan 430072

Corresponding author: YANG Chun-Hai,
Received Date: 2 June 2006
Available Online: 30 December 2006
Fund Project: 湖北省自然科学基金(2004ABA235) (2004ABA235)湖北省教育厅重点项目(D200629004,D200529004)资助 (D200629004,D200529004)

A multi-wall carbon nanotubes (MWNTs)-Nafion film-coated glassy carbon electrode (GCE) was fabricated,and the electrochemical behavior of ofloxacin on the MWNTs-Nafion film-coated GCE was investigated via cyclic voltammetry (CV),linearsweep voltammetry (LSV),and electrochemical impedance spectroscopy (EIS).The oxidation peak current of ofloxacin increased significantly at the MWNTs-Nafion film modified GCE,compared with that at a bare GCE.This nano-structured film electrode exhibited excellent enhancement effects on the electrochemical oxidation of ofloxacin.A well-defined oxidation peak attributed to ofloxacin was observed at 0.97 V and was applied to the determination of ofloxacin.The oxidation peak current was proportional to ofloxacin concentration in the ranges of 1.0×10^-8~1.0×10^-6 mol/L and 1.0×10^-6~2.0×10^-5 mol/L,and a detection limit of 8.0×10^-9 mol/L was obtained for 400 s accumulation at open circuit (S/N=3).The method was demonstrated via determining ofloxacin in human urine and the result was satisfactory.
- multi-wall carbon nanotubes (MWNTs)-Nafion film,
- ofloxacin,
- chemically modified electrodes (CMEs),
- voltammetry
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