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Updated: Apr 20, 2026

Electrochemical Impedance Spectroscopy as a Tool for Electrochemical Rate Constant Estimation
Published on: October 10, 2018
Application of ionic liquid-TiO2 nanoparticle modified carbon paste electrode for the voltammetric determination of
Ali A Ensafi1, Hajar Bahrami1, B Rezaei1
1Department of Chemistry, Isfahan University of Technology, Isfahan 84156-83111, Iran.
Abstract:
An ionic liquid-TiO2 nanoparticle modified carbon paste electrode (IL-TiO2/CPE) was used as a fast and sensitive tool for the investigation of the electrochemical oxidation of benserazide using voltammetry. This modified electrode has been fabricated using hydrophilic ionic liquid (n-hexyl-3-methylimidazolium hexafluoro phosphate) as a binder. The modified electrode offers a considerable improvement in voltammetric sensitivity toward benserazide, compared to the bare electrode. Using differential pulse voltammetry (DPV), the electrocatalytic oxidation peak current of benserazide shows a linear calibration curve in the range of 1.0-600 μmol L(-1) benserazide. The limit of detection was equal to 0.4 μmol L(-1). The relative standard deviation (RSD%) for eight successive assays of 10 μmol L(-1) benserazide was 1.1%. Finally, the proposed method was successfully applied to the determination of benserazide in real samples such as blood serum and urine.
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