Ссылочный номер
ISO 247:1990
© ISO 2024
ISO 247:1990
Rubber — Determination of ash
Версия 3
1990-11
В время отменен
Отозвано (Версия 3, 1990)

Тезис

The two methods are applicable to raw, compounded and vulcanized rubbers of the families described in ISO 1629. The principle of method A consists in heating a weighed test portion in a crucible over a gas burner, followed by volatilization of the decomposition products and transfer of the crucible to a muffle furnace. The crucible is heated until all the carbonaceous matter has been burnt off and constant mass is attained. In method B a weighed test portion is heated in a crucible in the presence of sulfuric acid, first by means of a gas burner and then in a muffle furnace as in method A. Platinum crucibles shall be used for ashing fluorine-containing and lithium-polymerized rubbers. Cancels and replaces the second edition ISO 247:1978, which contains three methods of determination.

Общая информация

  • Текущий статус
     : Отозвано
    Дата публикации
     : 1990-11
    Этап
    : Отмена международного стандарта [95.99]
  • Версия
     : 3
  • Технический комитет :
    ISO/TC 45/SC 2
    ICS :
    83.060 
  • RSS обновления

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  2. Интернет-магазин
  3. Каталог стандартов
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  7. ISO 247:1990