DIN Standards Committee Materials Testing
ISO 4280
Cryolite, natural and artificial, and aluminium fluoride for industrial use; Determination of sulphate content; Barium sulphate gravimetric method
Kryolith, natürlich oder künstlich, sowie Aluminiumfluorid für Industriezwecke; Bestimmung des Sulfatgehaltes; gravimetrische Bariumsulfatmethode
Responsible national committee
NA 062-02-81 AA - Testing of carbonaceous materials
Responsible international committee
ISO/TC 226 - Materials for the production of primary aluminium