ISO 3391
Cryolite, natural and artificial; Determination of calcium content; Flame atomic absorption method
Natürlicher oder künstlicher Kryolith; Bestimmung des Calciumgehaltes; spektrophotometrische Flamm-Atom-Absorptions-Methode
Responsible national committee
NA 062-08-114 AA - Testing of carbonaceous materials
Responsible international committee
ISO/TC 226 - Materials for the production of primary aluminium