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    STUDIA CHEMIA - Issue no. 4 / 2013  
         
  Article:   ELECTROCHEMICAL BEHAVIOR OF SOME CATECHOLAMINES INVESTIGATED BY CYCLIC AND SQUARE-WAVE VOLTAMMETRY.

Authors:  GRAZIELLA LIANA TURDEAN, DORINA CASONI. 		 
       
         
  Abstract:   Electrochemical measurements of the oxidation of organic compounds can be helpful to understand how these compounds are metabolized by living organisms. Cyclic and square-wave voltammetry were used in view to estimate the electrochemical parameters of redox processes involving catecholamines compounds (isoprenaline, epinephrine, levonordefrin, norepinephrine, dopamine, d-DOPA and carbidopa). Redox processes related to catecholamines are quasi-reversible diffusion controlled reactions at a graphite electrode. According to the decreasing of the oxidation potential, the capacity to act as antioxidant of different catecholamines increases in the order: norepinephrine < levonordefrin < epinephrine < isoprenaline or carbidopa < d-DOPA < dopamine. Both series are influenced by the position of –OH and –NH2 in para-alkyl substituents.

Keywords: catecholamine, cyclic voltammetry, square wave voltammetry, antioxidant capacity.
 
         
     
         
         
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