Reference number
ISO 4275:1977
ISO 4275:1977
Ammonium hydrogen carbonate for industrial use (including foodstuffs) — Determination of arsenic content — Silver diethyldithiocarbamate photometric method
Edition 1
1977-11
Retirada
ISO 4275:1977
10115
Retirada (Edición 1, 1977)

Resumen

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).

Informaciones generales

  •  : Retirada
     : 1977-11
    : Retirada de la Norma Internacional [95.99]
  •  : 1
     : 2
  • ISO/TC 47
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