BS 4993-3:1974
Methods of test for aluminium fluoride for industrial use - Determination of silica content

Standard No.

BS 4993-3:1974

Release Date

1974

Published By

British Standards Institution (BSI)

Status

Be replaced

Replace By

BS 4993-3:1974(2011)

Latest

BS 4993-3:1974(2011)

Scope

Fusion of a test portion with sodium carbonate/boric acid, dissolution of the melt in nitric acid, formation of the yellow (oxidized) silico-molybdic complex, reduction to the blue form and spectrophotometric measurement at 815 nm.

BS 4993-3:1974 history

• 0000 BS 4993-3:1974(2011)
• 1974 BS 4993-3:1974 Methods of test for aluminium fluoride for industrial use - Determination of silica content