Ссылочный номер
ISO 900:1977
© ISO 2024
ISO 900:1977
Aluminium oxide primarily used for the production of aluminium — Determination of titanium content — Diantipyrylmethane photometric method
Версия 1
1977-10
В время отменен
Отозвано (Версия 1, 1977)

Тезис

Applicable to all products having a titanium dioxide content of equal to or more than 0.001 % (m/m). Describes the preparation of the diantipyrylmethane solution and the preparation of the titanum standard solution. The procedure of the preparation of a principal solution or the chemical analysis by an alkaline fusion is carried out according to ISO 804 replacing the nitric acid solution by the sulphuric one. After extraction of the fused mass with sulphuric acid solution formation of the titanium-diantipyrylmethane complex (approximately 4.6 N solution). Photometric measurement of the coloured complex at a wavelength of about 420 nm. Has also been approved by the IUPAC. Replaces and cancels ISO Recommendation R 900/1968 of which it constitutes a technical revision.

Общая информация

  • Текущий статус
     : Отозвано
    Дата публикации
     : 1977-10
    Этап
    : Отмена международного стандарта [95.99]
  • Версия
     : 1
  • Технический комитет :
    ISO/TC 226
    ICS :
    71.100.10 
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  2. Интернет-магазин
  3. Каталог стандартов
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  5. 71
  6. 71.100
  7. 71.100.10
  8. ISO 900:1977