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    STUDIA CHEMIA - Issue no. 1-2 / 2001  
         
  Article:   POTENTIOMETRIC ANALYSIS OF ANIONIC SURFACTANTS BY ION-SELECTIVE ELECTRODE CONTAINING METHYLTRICAPRYLAMMONIUM CHLORIDE.

Authors:  CRISTINA MIHALI, ELENA HOPÂRTEAN, GABRIELA OPREA. 		 
       
         
  Abstract:  Surfactants are very important in modern society, but they are also important pollutants. They have a negative impact on the environment especially on water. Anionic surfactants are the most widespread among the surfactants class. They comprise approximately 70% of all the surfactants manufactured; therefore they are often subject of environmental monitoring. The determination of anionic surfactants with surfactants-selective electrodes is an alternative method to the standard methylene blue-method and the two-phase titration method. We realised a polymeric membrane electrode selective to anionic surfactant based on methyltricaprylammonium chloride and plasticized with tricresylphosphate. This electrode gives a linear response for sodium dodecylsulphate between 5x10-6 and 5x10-3 with a nearnernstian slope.  
         
     
         
         
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