Sensitive Voltammetric Determination of Captopril Using a Carbon Paste Electrode Modified with Nano-TiO2/Ferrocene Carboxylic Acid

doi:10.1016/S1872-2067(10)60268-9

催化学报 ›› 2011, Vol. 32 ›› Issue (11): 1685-1692.DOI: 10.1016/S1872-2067(10)60268-9

Sensitive Voltammetric Determination of Captopril Using a Carbon Paste Electrode Modified with Nano-TiO2/Ferrocene Carboxylic Acid

Jahan Bakhsh RAOOF*, Reza OJANI, Mehdi BAGHAYERI

Electroanalytical Chemistry Research Laboratory, Department of Analytical Chemistry, Faculty of Chemistry, Mazandaran University, Babolsar 47416-95447, Iran

收稿日期:2011-06-07 修回日期:2011-08-10 出版日期:2011-11-14 发布日期:2015-03-30

Sensitive Voltammetric Determination of Captopril Using a Carbon Paste Electrode Modified with Nano-TiO2/Ferrocene Carboxylic Acid

Jahan Bakhsh RAOOF*, Reza OJANI, Mehdi BAGHAYERI

Electroanalytical Chemistry Research Laboratory, Department of Analytical Chemistry, Faculty of Chemistry, Mazandaran University, Babolsar 47416-95447, Iran

Received:2011-06-07 Revised:2011-08-10 Online:2011-11-14 Published:2015-03-30

摘要/Abstract

摘要： A carbon paste electrode (CPE) modified with ferrocene carboxylic acid (FcCA) and TiO₂ nanoparticles was constructed by incorporating TiO₂ nanoparticles and ferrocene carboxylic acid into the carbon paste matrix. The electrochemical behavior of captopril (CAP) at the surface of the modified electrode was investigated using electroanalytical methods. The modified electrode showed excellent electrocatalytic activity for the oxidation of CAP in aqueous solutions at physiological pH values. Cyclic voltammetric curves showed that the oxidation of CAP at the surface of the modified electrode reduced its overpotential by more than 290 mV. The modified electrode was used for detecting captopril using cyclic voltammetry and square wave voltammetry techniques. A calibration curve in the range of 0.03 to 2400 µmol/L was obtained that had a detection limit of 0.0096 µmol/L (3s) under the optimized conditions. The modified electrode was successfully used for the determination of captopril in pharmaceutical and biological samples.

关键词: electrocatalysis, modified electrode, nano-TiO2, ferrocene carboxylic acid captopril, cyclic voltammetry

Abstract: A carbon paste electrode (CPE) modified with ferrocene carboxylic acid (FcCA) and TiO₂ nanoparticles was constructed by incorporating TiO₂ nanoparticles and ferrocene carboxylic acid into the carbon paste matrix. The electrochemical behavior of captopril (CAP) at the surface of the modified electrode was investigated using electroanalytical methods. The modified electrode showed excellent electrocatalytic activity for the oxidation of CAP in aqueous solutions at physiological pH values. Cyclic voltammetric curves showed that the oxidation of CAP at the surface of the modified electrode reduced its overpotential by more than 290 mV. The modified electrode was used for detecting captopril using cyclic voltammetry and square wave voltammetry techniques. A calibration curve in the range of 0.03 to 2400 µmol/L was obtained that had a detection limit of 0.0096 µmol/L (3s) under the optimized conditions. The modified electrode was successfully used for the determination of captopril in pharmaceutical and biological samples.

Key words: electrocatalysis, modified electrode, nano-TiO2, ferrocene carboxylic acid captopril, cyclic voltammetry

Jahan Bakhsh RAOOF, Reza OJANI, Mehdi BAGHAYERI. Sensitive Voltammetric Determination of Captopril Using a Carbon Paste Electrode Modified with Nano-TiO2/Ferrocene Carboxylic Acid[J]. 催化学报, 2011, 32(11): 1685-1692.

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Sensitive Voltammetric Determination of Captopril Using a Carbon Paste Electrode Modified with Nano-TiO2/Ferrocene Carboxylic Acid

Sensitive Voltammetric Determination of Captopril Using a Carbon Paste Electrode Modified with Nano-TiO2/Ferrocene Carboxylic Acid

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