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Citation: GAO Peng, SHI Jin, LI Ju-Nan, LIU Shu-Mei. Anodic Adsorptive Voltammetric Determination of Ofloxacin at A Carbon Paste Electrode[J]. Chinese Journal of Applied Chemistry, ;2005, 22(5): 578-580. shu

Anodic Adsorptive Voltammetric Determination of Ofloxacin at A Carbon Paste Electrode

1.
College of Chemistry, Xiangtan University, Xiangtan 411105

Corresponding author: LI Ju-Nan,
Received Date: 14 July 2004
Available Online: 3 November 2004
Fund Project:

A highly selective and rapid anodic adsorptive voltammetric method was developed for the determination of ultra trace amount of ofloxacin at a carbon paste electrode (CPE).The ofloxacin adsorbed on the surface of the CPE in a 0.096 mol/L KHP-NaOH buffer solution (pH=5.6) could produce one oxidation peak at 0.92 V(vs.SCE) when scanning was performed from 0.4 to 1.4 V.The relationship between the peak current and the ofloxacin concentration was linear in the ranges of 5.5×10^-9~5.5×10^-8 mol/L (75 s accumulation) and 3.3×10^-8~3.3×10^-7 mol/L (30 s accumulation).The correlation coefficients were 0.996 and 0.998,respectively.Its detection limit was 9.0×10^-10 mol/L (S/N=3) for 150 s accumulation.The electrode reaction mechanism of ofloxacin was investigated.The proposed method was applied to analyze trace ofloxacin in urine samples.The result was in good agreement with that obtained by spectrophotometry determination.
- ofloxacin,
- anodic adsorptive voltammetry,
- carbon paste electrode
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