Résumé

The method consists in decomposition of the soap by a known volume of standard volumetric mineral acid solution, extraction and separation of the liberated fatty matter with light petroleum and determination of a total alkali content by titration of the excess of acid contained in the aqueous phase with a standard volumetric sodium hydroxide solution. After evaporation of the light petroleum from the extract, dissolution of the residue in ethanol and neutralization of the fatty acids with a standard volumetric potassium hydroxide solution. Evaporation of the ethanol and weighing of the soap formed to determine the total fatty matter content.


Informations générales 

  • État actuel
     : Annulée
    Date de publication
     : 1975-10
  • Edition
     : 1
    Nombre de pages
     : 3
  • Comité technique
     : ISO/TC 91 Agents de surface
  • ICS
     :
    71.100.40 Agents de surface

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  6. ISO 685:1975