Ссылочный номер
ISO 4275:1977
ISO 4275:1977
Ammonium hydrogen carbonate for industrial use (including foodstuffs) — Determination of arsenic content — Silver diethyldithiocarbamate photometric method
Версия 1
1977-11
В время отменен
ISO 4275:1977
10115
Отозвано (Версия 1, 1977)

Тезис

Applicable to products having As contents more than 0.2 mg/kg. The principle consists in reduction of the element to arsine in a solution of silver diethyldithiocarbamate in pyridine. Photometric measurement of the purplish- red colour produced by the colloidally dispersed silver, at the maximum of the absorption curve (wavelength approximately 540 nm).

Общая информация

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

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