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Fabrication of modified TiO 2 nanoparticle carbon paste electrode for simultaneous determination of dopamine, uric acid, and l-cysteine

Mazloum Ardakani, M ; Sharif University of Technology | 2009

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  1. Type of Document: Article
  2. DOI: 10.1007/s10008-008-0692-2
  3. Publisher: 2009
  4. Abstract:
  5. A carbon paste electrode, modified with 2, 2″-[1,7- hepthandiylbis(nitriloethylidyne)]-bis-hydroquinone and TiO 2 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 (k s) 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. © 2008 Springer-Verlag
  6. Keywords:
  7. A-carbon ; Carbon paste electrode ; Detection limits ; Dopamine ; Dynamic range ; Electron transfer coefficient ; Heterogeneous rate constant ; L-Cysteine ; Real samples ; Simultaneous determinations ; Square wave voltammetry ; TiO ; Uric acid ; Uric acids ; Brain ; Chronoamperometry ; Ketones ; Nanoparticles ; Organic acids ; Phenols ; Rate constants ; Cyclic voltammetry
  8. Source: Journal of Solid State Electrochemistry ; Volume 13, Issue 9 , 2009 , Pages 1433-1440 ; 14328488 (ISSN)
  9. URL: https://link.springer.com/article/10.1007/s10008-008-0692-2