Numéro de référence
ISO 4275:1977
ISO 4275:1977
© ISO 2024
ISO 4275:1977
Bicarbonate d'ammonium à usage industriel (y compris les industries alimentaires) — Dosage de l'arsenic — Méthode photométrique au diéthyldithiocarbamate d'argent
Edition 1
1977-11
1977-11
Annulée
Résumé
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).
Cycle de vie
Vous avez une question?
Consulter notre Aide et assistance
Service à la clientèle
+41 22 749 08 88
Horaires d’ouverture:
De lundi à vendredi - 09:00-12:00, 14:00-17:00 (UTC+1)