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    STUDIA CHEMIA - Issue no. 2 / 2003  
         
  Article:   LOGARITHMIC EXTRAPOLATION METHOD FOR KINETIC DETERMINATION OF AMINE MIXTURES.

Authors:  LUCIAN COPOLOVICI, I. BALDEA.
 
       
         
  Abstract:  A kinetic method for the simultaneous determination of binary mixtures of aromatic amines and of -naphtol and 1-phenyl-3-methylpyrazolin-5-one by logarithmic extrapolation is reported. The method involves the formation of an azo dye between coupling agent and a diazonium salt formed from the amine in the presence of nitrite in weak acidic media. The reaction is monitored spectrophotometrically by the formation of an azodye absorbing at 420 nm.  
         
     
         
         
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