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    STUDIA CHEMIA - Ediţia nr.4(II) din 2009  
         
  Articol:   STUDY ON THE INHIBITION OF BRIGGS-RAUSCHER OSCILLATING REACTION.

Autori:  LÉNÁRD-ISTVÁN CSEPEI, CSABA BOLLA. 		 
       
         
  Rezumat:  We present the results concerning our exploratory study on the effect of four compounds (ascorbic acid, tartaric acid, pyrogallol and salicylic acid) on the Briggs-Rauscher oscillating reaction. In case of ascorbic acid, tartaric acid and pyrogallol, a linear increase of the inhibition time with the concentration of these substances was observed. We also paid attention on the changes of color and redox potential of the reacting mixture in the moment of addition of the above mentioned compounds. The observations showed that ascorbic acid and tartaric acid manifest an inhibitory effect through their strong reducing properties. Pyrogallol acts like other polyphenolic antioxidants studied before. Salicylic acid, unlike all of the phenolic and polyphenolic compounds described before, did not stop instantly the oscillations.

Keywords: Briggs-Rauscher oscillating reaction, inhibitory effect, ascorbic acid, tartaric acid, pyrogallol, salicylic acid
  
         
     
         
         
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