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.
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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.
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