NF T20-209:1973 Aluminium oxide primarily used for the production of aluminium. Determination of vanadium. N-benzoyl-n-phenyl-hydroxylamine photometric method.
1973NF T20-209:1973 Aluminium oxide primarily used for the production of aluminium. Determination of vanadium. N-benzoyl-n-phenyl-hydroxylamine photometric method.