ISO 2465:1974
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ISO 2465:1974
7380

Текущий статус : Отозвано

Тезис

The method is applicable tp products with a content greater than 0,1 mg/kg. It is applied to a test portion as it is, and to another identical portion with a known quantity of arsenic added. The principle consists in reduction of the arsenic by zinc in a hydrochloric acid medium, with the formation of arsine; absorption of the 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 at a wavelength of about 540 nm.

Общая информация

  •  : Отозвано
     : 1974-09
    : Отмена международного стандарта [95.99]
  •  : 1
  • ISO/TC 47
    71.080.60 
  • RSS обновления

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