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ISO 2522:1974

$11.05

Tritolyl phosphate for industrial use — Determination of apparent free phenols content — Volumetric method

Published By Publication Date Number of Pages
ISO 1974-04 4
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The method specified determines only those phenols capable of reacting at the 2nd, 4th and 6th position (-OH = 1). The procedure consists in extraction of free phenols from a test portion with sodium hydroxide solution. Bromination of these phenols with potassium bromide-bromate solution in an acid medium and determination of the excess bromine after reaction with potassium iodide by titration with standard volumetric sodium thiosulphate solution.

ISO 2522:1974
$11.05