Numéro de référence
ISO 7099:1983
ISO 7099:1983
© ISO 2024
ISO 7099:1983
Acide phosphorique à usage industriel (y compris les industries alimentaires) — Dosage du sulfure d'hydrogène — Méthode titrimétrique
Edition 1
1983-10
1983-10
Annulée
Résumé
The hydrogen sulphide in a test portion is removed in a stream of nitrogen and absorbed in a solution of sodiumhydroxide in aqueous acetone. the sulphide ions are titrated with standard volumetric mercury(II) acetate solution, in the presence of 1,5-diphenylthiocarbazone (dithizone) as indicator. The method is applicable to products having hydrogen sulfide contents greater than or equal to 0.05 mg/kg.