Numéro de référence
ISO 2465:1974
ISO 2465:1974
Glycérines à usage industriel — Dosage de l'arsenic — Méthode photométrique au diéthyldithiocarbamate d'argent
Edition 1
1974-09
Annulée
ISO 2465:1974
7380
Annulée (Edition 1, 1974)

Résumé

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.

Informations générales

  •  : Annulée
     : 1974-09
    : Annulation de la Norme internationale [95.99]
  •  : 1
     : 3
  • ISO/TC 47
    71.080.60 
  • RSS mises à jour

Vous avez une question?

Consulter notre Aide et assistance