BS 4140-19:1986
Methods of test for aluminium oxide. Determination of boron content

Standard No.

BS 4140-19:1986

Release Date

1986

Published By

British Standards Institution (BSI)

Latest

BS 4140-19:1986

Replace

BS 4140 Addendum No. 3:1974 Addendum No. 3 (1974) to BS 4140-1974 85/52368 DC

Scope

This International Standard specifies a curcumin spectrophotometric method for the determination of the boron content of aluminium oxide primarily used for the production of aluminium. The method is applicable to boron contents, expressed as boron oxide (B2O3), greater than 0,000 6 % (i.e. 0,000 2 % expressed as boron (B)). NOTE —The sensitivity of the method, as may be gathered from the calibration curve, is in fact higher. In the case of a very low blank reading, and with sufficiently sensitive apparatus, the lower limit of application of the method may be extended to 0,000 08 % of boron oxide (B2O3), corresponding to 0,000 025 % of boron (B).

BS 4140-19:1986 history

• 1986 BS 4140-19:1986 Methods of test for aluminium oxide. Determination of boron content
• 0000 BS 4140 Addendum No. 3:1974