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Citation: WU Fang-Hui, ZHU Jing, HE Xiao-Jun. Electrochemical Determination of Ofloxacin Using Electrode Modified with Aligned Carbon Nanotubes[J]. Chinese Journal of Applied Chemistry, ;2008, 25(7): 792-796. shu

Electrochemical Determination of Ofloxacin Using Electrode Modified with Aligned Carbon Nanotubes

1.
School of Chemistry and Chemical Engineering, Anhui University of Technology, Ma'anshan 243002

Corresponding author: WU Fang-Hui,
Received Date: 27 July 2007
Available Online: 8 November 2007
Fund Project: 安徽省高校青年教师基金(2005JQ1076) (2005JQ1076)

The electrochemical behavior of ofloxacin at glassy carbon electrode (GCE) modified with aligned carbon nanotubes (ACNTs) was investigated.The results showed the oxidation peak current of ofloxacin increased significantly at the ACNTs-modified GCE in comparison with that at bared GCE.The experiment parameters such as the type and acidity of the electrolyte,the accumulation time,the thickness of the ACNTs-modified layer and scan rate were optimized.Linear correlation between the oxidation peak current and the concentration of ofloxacin was found over a range from 8.0×10^-7 to 2.0×10^-3 mol/L with a detection limit of 3.2×10^-7 mol/L.In 0.1 mol/L Britton-Robinson buffer solution (pH 7.0),the presence of a lot of metal ions and ascorbic acid and urin etc did not interfere with the determination of ofloxacin.The relative standard deviation (RSD) of ten measurements was 4.2% for ofloxacin,indicating good reproducibility.This method was used to determine the ofloxacin concentration in real ofloxacin samples with good results.
- ofloxacin,
- aligned carbon nanotubes,
- chemically modified electrode
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