Abstract / scope
Based on evaporation of a test portion in a platinum dish, followed by ignition in an electric furnace, controlled at (850 50) °C, and weighing. - Replaces ISO Recommendation R 913-1968.
ISO 913:1977Withdrawn
Sulphuric acid and oleum for industrial use — Determination of ash — Gravimetric method
Acide sulfurique et oléums à usage industriel — Dosage du résidu fixe calciné — Méthode gravimétrique