Numéro de référence
ISO 6677:1983
ISO 6677:1983
© ISO 2024
ISO 6677:1983
Acide hexafluorosilicique à usage industriel — Dosage du fluor utilisable — Méthode potentiométrique après distillation
Edition 1
1983-05
1983-05
Annulée
Résumé
Covers a method consisting in separating the fluorine from a test portion by distillation in the presence of perchloric acid, followed by potentiometric titration of the distillate with lanthanum nitrate solution using a fluoride ion-selective electrode. Is applicable to products having total available fluorine contents in the range between 15 and 35 % (m/m).