ISO 914:1977 PDF
Sulphuric acid and oleum for industrial use — Determination of total nitrogen content — Titrimetric method after distillation
Название (английский):
ISO 914:1977
Sulphuric acid and oleum for industrial use — Determination of total nitrogen content — Titrimetric method after distillation
- Статус документа:
- Отменён
- Формат:
- Электронный (PDF)
- Количество страниц:
- 4
- Дата публикации:
- 1 ноября 1977 г.
- Издание:
- ISO IS 914 edition 1 version 1
- ICS:
- 71.060.30
Описание (английский):
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.
Технические детали
- Технический комитет
- ISO/TC 47 - Chemistry
- SKU
- ISO 914:1977