Numéro de référence
ISO 1616:1976
ISO 1616:1976
© ISO 2025
ISO 1616:1976
Glycérines à usage industriel — Détermination des cendres sulfatées — Méthode gravimétrique
Edition 1
1976-02
1976-02
Annulée
Résumé
The method is applicable to products yielding a quantity of sulphated ash equal to or less than 0.5 % (m/m). The principle is based on combustion of a test portion and calcination of the residue in the presence of sulphuric acid in a platinum or porcelain dish between 800 °C and 850 °C. Weighing of the residue thus obtained. - Replaces ISO Recommendation R 1616-1970.