| Electrochemical behaviors,electrochemical kinetics and electrochemical determination of carbamazepine（CBZ） at nano-titanium dioxide（nano-TiO2） and 1-benzyl-3-methylimidazole hexafluorophosphate（［BnMIM］PF6） modified carbon paste electrode（nano-TiO2-［BnMIM］PF6/CPE） were investigated by cyclic voltammetry（CV）,chronocoulometry（CC）,chronoamperometry（CA） and square wave voltammetry（SWV）.The experimental results showed that the oxidation peak potential of CBZ was shifted negatively at nano-TiO2-［BnMIM］PF6/CPE and the oxidation peak current was greatly increased than that on CPE,which indicated that nano-TiO2-［BnMIM］PF6/CPE could catalyze the oxidation of CBZ well.The plot of oxidation peak current versus the square root of scanning rate in the potential range of 10-1 000 mV?s-1 showed a good linear relationship,as expected for a diffusion-controlled feature of the electrochemical process for CBZ at nano-TiO2-［BnMIM］PF6/CPE.The results of square wave voltammetry（SWV）indicated that the oxidation peak current was linearly proportional to the concentration of CBZ in the range of 2.0×10-5-5.0×10-4 mol?L-1 and 5.0×10-4-1.0×10-3 mol?L-1,with a detection limit of 4.3×10-7 mol?L-1.The method was applied in the determination of carbamazepine（CBZ） content in commercial pills,with relative standard deviations of 0.36%-0.77% and spiked recoveries of 98%-104%. |