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    STUDIA CHEMIA - Issue no. 1-2 / 2002  
         
  Article:   DETERMINATION OF SOME AMINOACIDS FROM PHARMACEUTICAL PRODUCTS BY USING A KINETIC METHOD BASED ON A CLOCK LANDOLT-TYPE SYSTEM OF REDOX REACTIONS.

Authors:  SIMONA BUNGĂU, I. BALDEA, LUCIAN COPOLOVICI. 		 
       
         
  Abstract:  A kinetic method is described for micro-determination of cysteine, methionine and L- tryptophan, based on a Landolt-type clock system. The reaction has been followed potentiometricaly. The method is sensitive, simple and allows the determination of the aminoacid concentration in pharmaceutical products with very good accuracy. The proposed method was compared to other standard method or to the certified content given by manufacturers.  
         
     
         
         
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