Journal
JOURNAL OF ANALYTICAL CHEMISTRY
Volume 69, Issue 2, Pages 162-168Publisher
MAIK NAUKA/INTERPERIODICA/SPRINGER
DOI: 10.1134/S106193481402004X
Keywords
captopril; ferrocene-based polyamide; carbon nanotubes paste electrode; electrocatalysis
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Funding
- Young Research Club, Islamic Azad University, Qaemshahr Branch
- Iran Polymer and Petrochemical Institute
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A modified carbon paste electrode was prepared by incorporating multi-wall carbon nanotubes with a ferrocene-based polyamide (FDADO-IPC). A mixture of fine graphite powder with 10 wt % of multi-wall carbon nanotubes was applied to the preparation of the carbon paste (by dispersing in paraffin) that was finally modified with a ferrocene polyamide complex. The electrocatalytic oxidation of captopril (CAP) was investigated on the surface of the FDADO-IPC multi-wall carbon nanotubes modified carbon paste electrode (FDADO-IPC-MCNTPE) using cyclic voltammetry (CV), differential pulse voltammetry (DPV), chronoamperometry (CHA) and chronocoloumetry (CHC). Using the modified electrode, the kinetics of CAP electrooxidation was considerably enhanced by lowering the anodic overpotential through a catalytic fashion. A linear dynamic range of 0.2-200 mu M for CAP was obtained in buffered solutions at pH 7.0. The detection limit was 0.08 mu M. Differential pulse voltammetry as a simple, rapid, sensitive, and selective method was developed for the determination of CAP in tablet and human urine without any treatment.
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