ISO 1694
Cryolite, natural and artificial; Determination of iron content; 1,10- Phenanthroline photometric method
Kryolith (natürlich oder künstlich); Bestimmung des Eisengehaltes; Photometermethode mit 1,10-Phenanthrolin
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