Standard

ISO 685:1975

Radié

Note: Version actuelle: ISO 685:2020

Amendements et versions existants ou nouveaux doivent être achetés séparément.

Langue
Format

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.

Spécifications des produits

  • Standard de ISO
  • Publié:
  • Radié:
  • Version: 1
  • Type de document: IS
  • Pages
  • Editeur: ISO
  • Distributeur: ISO
  • ICS: 71.100.40
  • Comité international: ISO/TC 91

Relations produit

Cycle de vie du produit