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    STUDIA CHEMIA - Issue no. 4 / 2013  
         
  Article:   ELECTROCHEMICAL STUDY OF ISOPRENALINE AND EPINEPHRINE AT PLATINUM-NANOPARTICLES-CHITOSAN MODIFIED GRAPHITE ELECTRODE.

Authors:  DORINA CASONI, GRAZIELLA LIANA TURDEAN. 		 
       
         
  Abstract:   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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