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BS 4993-1:1974

BS 4993-1:1974

$86.31

Methods of test for aluminium fluoride for industrial use – Determination of fluorine content

Published By Publication Date Number of Pages
BSI 1974 10
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This Part of BS 4993 specifies a modified Willard-Winter method for the determination of the fluorine content of aluminium fluoride for industrial use.

NOTE The titles of the British Standards referred to in this standard are listed on the inside back cover.

Fusion of a test portion with sodium carbonate and separation of the fluorine by distillation with sulphuric acid. Titration of the distillate with thorium nitrate solution using either sodium alizarinsulphonate with or without methylene blue as masking agents, or methylthymol blue as indicator.

BS 4993-1:1974
$86.31