Ссылочный номер
ISO 3000:1974
ISO 3000:1974
Sodium tripolyphosphate for industrial use — Estimation of tripolyphophate content — Tris(ethylenediamine) cobalt (III) chloride gravimetric method
Версия 1
1974-12
В время отменен
ISO 3000:1974
8050
Отозвано (Версия 1, 1974)

Тезис

Not applicable in the presence of metaphosphate. The presence of pyrophosphate at normal concentrations Ämaximum 6 % (m/m)Ü does not interfere. The principle consists in precipitation of tripolyphosphate as its complex with tris(ethylenediamine) cobalt(III) chloride at a pH of between 3 and 4 in a buffered medium. Filtration, washing, drying and weighing of the precipitate. Details the preparation of the reagent used for analysis. Has also been approved by the IUPAC.

Общая информация

  •  : Отозвано
     : 1974-12
    : Отмена международного стандарта [95.99]
  •  : 1
  • ISO/TC 47
    71.060.50 
  • RSS обновления

Появились вопросы?

Ознакомьтесь с FAQ