Ссылочный номер
ISO 914:1977
ISO 914:1977
Sulphuric acid and oleum for industrial use — Determination of total nitrogen content — Titrimetric method after distillation
Версия 1
1977-11
В время отменен
ISO 914:1977
5319
Отозвано (Версия 1, 1977)

Тезис

The method is applicable to products having a total nitrogen content equal to or greater than 0.05 % (m/m). The principle consists in the conversion of the nitrogen present in a test portion to ammonia by means of nascent hydrogen. Distillation and absorption of the ammonia in an excess of standard volumetric sulphuric acid solution, and back-titration with a standard volumetric sodium hydroxide solution in the presence of an indicator. - Replaces ISO Recommendation R 914-1968.

Общая информация

  •  : Отозвано
     : 1977-11
    : Отмена международного стандарта [95.99]
  •  : 1
  • ISO/TC 47
    71.060.30 
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