Ссылочный номер
ISO 4284:1993
ISO 4284:1993
Acid-grade and ceramic-grade fluorspar — Determination of sulfide content — Iodometric method
Версия 3
1993-01
В время отменен
ISO 4284:1993
10129
Отозвано (Версия 3, 1993)

Тезис

The principle of the method specified is digestion of a test portion in a sealed apparatus in a mixture of hydrochloric acid, tin(II) chloride and boric acid solutions, absorption of the liberated hydrogen sulfide, entrained in a stream of oxygen-free argon or nitrogen, in zinc acetate solution and iodometric determination of the zinc sulfide formed. The method is applicable to products having a sulfide content equal to or greater than 0,001 % (m/m). It is not applicable, if presence of polysulfides is suspected.

Общая информация

  •  : Отозвано
     : 1993-01
    : Отмена международного стандарта [95.99]
  •  : 3
  • ISO/TC 175
    73.080 
  • RSS обновления

Жизненный цикл

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