Ссылочный номер
ISO 685:1975
ISO 685:1975
Analysis of soaps — Determination of total alkali content and total fatty matter content
Версия 1
1975-10
В время отменен
ISO 685:1975
4880
Отозвано (Версия 1, 1975)

Тезис

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.

Общая информация

  •  : Отозвано
     : 1975-10
    : Отмена международного стандарта [95.99]
  •  : 1
  • ISO/TC 91
    71.100.40 
  • RSS обновления

Жизненный цикл

Появились вопросы?

Ознакомьтесь с FAQ