Ссылочный номер
ISO 2871-2:1990
© ISO 2024
ISO 2871-2:1990
Surface active agents — Detergents — Determination of cationic-active matter content — Part 2: Cationic-active matter of low molecular mass (between 200 and 500)
Версия 1
1990-11
В время отменен
Отозвано (Версия 1, 1990)

Тезис

The method is also suitable for other cationic-active materials. Not applicable if anionic and/or amphoteric surface active agents are present. The sample is titrated in a two-phase (aqueous chloroform) system against a standard anionic surface active agent in the presence of an indicator consisting of mixed anionic and cationic dyes. The cationic surface active agent present in the sample initially reacts with the anionic dye to form a salt which dissolves in the chloroform, imparting a blue colour to this layer. During the titration, the anionic surface active agent displaces the anionic dye and, at the end point, forms a salt with the cationic dye, imparting a greyish-pink colour to the chloroform layer.

Общая информация

  • Текущий статус
     : Отозвано
    Дата публикации
     : 1990-11
    Исправленный вариант (английский)
     : 1992-12
    Этап
    : Отмена международного стандарта [95.99]
  • Версия
     : 1
  • Технический комитет :
    ISO/TC 91
    ICS :
    71.100.40 
  • RSS обновления

Жизненный цикл

Появились вопросы?

Ознакомьтесь с FAQ

  2. Интернет-магазин
  3. Каталог стандартов
  4. МКС
  5. 71
  6. 71.100
  7. 71.100.40
  8. ISO 2871-2:1990