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

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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.

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Acknowledgements

The authors wish to thank the Yazd University Research Council, the IUT Research Council, and the Excellence in Sensors for their financial supports to the present work.

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Authors and Affiliations

  1. Department of Chemistry, Yazd University, Yazd, 89195-741, Iran

    M. Mazloum Ardakani & A. Talebi

  2. Department of Chemistry, University of Kashan, Kashan, 87317, Iran

    H. Naeimi & M. Nejati Barzoky

  3. Nanoparticles and Coatings Lab, Department of Physics, Sharif University of Technology, Tehran, 14588, Iran

    N. Taghavinia

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  1. M. Mazloum Ardakani
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  2. A. Talebi
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Correspondence to M. Mazloum Ardakani.

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Ardakani, M.M., Talebi, A., Naeimi, H. et al. Fabrication of modified TiO2 nanoparticle carbon paste electrode for simultaneous determination of dopamine, uric acid, and l-cysteine. J Solid State Electrochem 13, 1433–1440 (2009). https://doi.org/10.1007/s10008-008-0692-2

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  • DOI: https://doi.org/10.1007/s10008-008-0692-2

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