Reference number
ISO 685:1975
© ISO 2024
ISO 685:1975
Analysis of soaps — Determination of total alkali content and total fatty matter content
Edition 1
1975-10
Withdrawn
Withdrawn (Edition 1, 1975)

Abstract

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.

General information

  • Status
     : Withdrawn
    Publication date
     : 1975-10
    Stage
    : Withdrawal of International Standard [95.99]
  • Edition
     : 1
    Number of pages
     : 3
  • Technical Committee :
    ISO/TC 91
    ICS :
    71.100.40 
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