Numéro de référence
ISO 1389-9:1977
ISO 1389-9:1977
© ISO 2024
ISO 1389-9:1977
Anhydride phtalique à usage industriel — Méthodes d'essai — Partie 9: Détermination des matières oxydables à froid par le permanganate de potassium —Méthode iodométrique
Edition 1
1977-02
1977-02
Annulée
Résumé
This method is not specific for maleic anhydride. The polarographic method specified in part 7 should be used. The principle is based on the oxidation of unsaturated organic acids and anhydrides in a test portion with an excess of cold standard volumetric potassium permanganate solution in the presence of sulphuric acid, followed by iodometric determination of the potassium permanganate remaining. - ISO 1389, Parts 1 to 11, replace ISO Recommendation R 1389-1970.