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AMBIENTUM BIOETHICA BIOLOGIA CHEMIA DIGITALIA DRAMATICA EDUCATIO ARTIS GYMNAST. ENGINEERING EPHEMERIDES EUROPAEA GEOGRAPHIA GEOLOGIA HISTORIA HISTORIA ARTIUM INFORMATICA IURISPRUDENTIA MATHEMATICA MUSICA NEGOTIA OECONOMICA PHILOLOGIA PHILOSOPHIA PHYSICA POLITICA PSYCHOLOGIA-PAEDAGOGIA SOCIOLOGIA THEOLOGIA CATHOLICA THEOLOGIA CATHOLICA LATIN THEOLOGIA GR.-CATH. VARAD THEOLOGIA ORTHODOXA THEOLOGIA REF. TRANSYLVAN
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STUDIA CHEMIA - Ediţia nr.4 din 2013 | |||||||
Articol: |
ELECTROCHEMICAL STUDY OF ISOPRENALINE AND EPINEPHRINE AT PLATINUM-NANOPARTICLES-CHITOSAN MODIFIED GRAPHITE ELECTRODE. Autori: DORINA CASONI, GRAZIELLA LIANA TURDEAN. |
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Rezumat:
Two catecholamines (epinephrine and isoprenaline) were studied by cyclic (CV) and square-wave voltammetry (SWV) at bare graphite (G) and Pt nanoparticles (Pt-NP) - chitosan modified graphite electrodes (G/Pt-NP-Chitosan). The obtained results shown similarly redox behavior for both investigated compounds by mentioned electrochemical techniques at the investigated electrodes, consisting in two pairs of peaks (peak I and II) corresponding to a quasi-reversible processes. The difference between the structures of compounds doesn’t influence the electrochemical parameters values. As expected, the presence of the Pt nanoparticles acts as a diffusion barrier on the electrode surface leading to a decrease of the current intensities values, when electrodes were investigated by CV and SWV. The G/Pt-NP-Chitosan nanocomposites matrix can be satisfactorily used for detecting catecholamines. Keywords: catecholamines, Pt nanoparticles, chitosan, cyclic voltammetry, square wave voltammetry.
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