• BS 4993-1:1974

BS 4993-1:1974

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

BSI Group , 02/28/1974

Publisher: BS

File Format: PDF

$80.00$160.02


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.Cross References:BS 410BS 1792BS 1848BS 2586BS 3145BS 3422BS 3978

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