caa a22 4500 445879734 CHVBK 20180317145538.0 cr unu---uuuuu 170323e20110201xx s 000 0 eng 10.1007/s00604-010-0471-5 doi (NATIONALLICENCE)springer-10.1007/s00604-010-0471-5 An innovative electrochemical approach for voltammetric determination of levodopa using gold nanoparticles doped on titanium dioxide nanotubes [Elektronische Daten] [Mir Hosseini, Masoud Faraji, Mohamad Momeni, Sohrab Ershad] Catalytic nanotubes made from titanium dioxide (TiO2-NTs) and covered with gold nanoparticles (Au-NPs) were prepared via galvanic deposition of the Au-NPs on the TiO2-NTs. The morphology and surface characteristics of the resulting electrodes were investigated using scanning electron microscopy and energy-dispersive X-ray spectroscopy. The results indicated that the Au-NPs were homogeneously deposited on the surface of TiO2-NTs which consist of individual tubes of about 40-80nm in diameter. The AuNPs with a size of 80-100nm are well-dispersed on the surface of the TiO2-NTs. The electro-catalytic activity of the electrodes towards the electro-oxidation of levodopa was studied by cyclic voltammetry, differential puls voltammetry. The results showed that the electrodes exhibit a considerably higher activity toward the oxidation of levodopa. The oxidation peak current linearly depends on the concentration of levodopa in the 10 to 70μM concentration range. Levodopa was determined by the method in pharmaceutical preparations, and results were found to be satisfactory. Figure Comparison of cyclic voltammograms of Au‐TiO2‐NTs/Ti and a flat gold electrode for determination levodopa. Springer-Verlag, 2010 Electrocatalytic oxidation nationallicence Levodopa nationallicence Au-TiO2-NTs/Ti electrode nationallicence Cyclic voltammetry nationallicence Hosseini Mir Tabriz Electrochemistry Research Laboratory, Department of Physical Chemistry, Chemistry Faculty, University of Tabriz, Zip code 0098-5166616471, Tabriz, Iran aut Faraji Masoud Tabriz Electrochemistry Research Laboratory, Department of Physical Chemistry, Chemistry Faculty, University of Tabriz, Zip code 0098-5166616471, Tabriz, Iran aut Momeni Mohamad Tabriz Electrochemistry Research Laboratory, Department of Physical Chemistry, Chemistry Faculty, University of Tabriz, Zip code 0098-5166616471, Tabriz, Iran aut Ershad Sohrab Department of Chemistry, Peyam-Nour University (PNU), Zip Code 0098-5413889931, Marand, Iran aut Microchimica Acta Springer Vienna 172/1-2(2011-02-01), 103-108 0026-3672 172:1-2<103 2011 172 604 https://doi.org/10.1007/s00604-010-0471-5 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s00604-010-0471-5 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Hosseini Mir Tabriz Electrochemistry Research Laboratory, Department of Physical Chemistry, Chemistry Faculty, University of Tabriz, Zip code 0098-5166616471, Tabriz, Iran aut NATIONALLICENCE 700 1- Faraji Masoud Tabriz Electrochemistry Research Laboratory, Department of Physical Chemistry, Chemistry Faculty, University of Tabriz, Zip code 0098-5166616471, Tabriz, Iran aut NATIONALLICENCE 700 1- Momeni Mohamad Tabriz Electrochemistry Research Laboratory, Department of Physical Chemistry, Chemistry Faculty, University of Tabriz, Zip code 0098-5166616471, Tabriz, Iran aut NATIONALLICENCE 700 1- Ershad Sohrab Department of Chemistry, Peyam-Nour University (PNU), Zip Code 0098-5413889931, Marand, Iran aut NATIONALLICENCE 773 0- Microchimica Acta Springer Vienna 172/1-2(2011-02-01), 103-108 0026-3672 172:1-2<103 2011 172 604 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer