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BS 4993-2 74th Edition, February 28, 1974
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Methods of Test for Aluminium Fluoride for Industrial Use Part 2: Determination of Iron Content
Includes all amendments and changes through Reaffirmation Notice , June 1, 2016
Page Count:10
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Dissolution of a test portion after alkaline or acid fusion and reduction of iron (III) to iron (II) with hydroxylammonium chloride. Formation of the iron (II) 1 ,10-phenanthroline complex and photometric measurement at 510 nm.