Journal of Solid State Electrochemistry

, Volume 13, Issue 9, pp 1433–1440

Fabrication of modified TiO2 nanoparticle carbon paste electrode for simultaneous determination of dopamine, uric acid, and l-cysteine

  • M. Mazloum Ardakani
  • A. Talebi
  • H. Naeimi
  • M. Nejati Barzoky
  • N. Taghavinia
Original Paper

DOI: 10.1007/s10008-008-0692-2

Cite this article as:
Ardakani, M.M., Talebi, A., Naeimi, H. et al. J Solid State Electrochem (2009) 13: 1433. doi:10.1007/s10008-008-0692-2

Abstract

A carbon paste electrode, modified with 2, 2′-[1,7-hepthandiylbis(nitriloethylidyne)]-bis-hydroquinone and TiO2 nanoparticles, was used for the simultaneous determination of dopamine (DA), uric acid (UA), and l-cysteine. The study was carried out by using cyclic voltammetry, chronoamperometry, and square wave voltammetry (SWV) techniques. Some kinetic parameters such as the electron transfer coefficient (α) and heterogeneous rate constant (ks) were also determined for the DA oxidation. A dynamic range of 8.0–1400 μM, with the detection limit of 8.4 × 10−7 M for DA, was obtained using SWV (pH = 7.0). The prepared electrode was successfully applied for the determination of DA, UA, and l-cysteine in real samples.

Keywords

Carbon paste electrodeDopamineUric acidl-CysteineNanoparticles

Copyright information

© Springer-Verlag 2008

Authors and Affiliations

  • M. Mazloum Ardakani
    • 1
  • A. Talebi
    • 1
  • H. Naeimi
    • 2
  • M. Nejati Barzoky
    • 2
  • N. Taghavinia
    • 3
  1. 1.Department of ChemistryYazd UniversityYazdIran
  2. 2.Department of ChemistryUniversity of KashanKashanIran
  3. 3.Nanoparticles and Coatings Lab, Department of PhysicsSharif University of TechnologyTehranIran