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.

General information

  • Status :  Withdrawn
    Publication date : 1974-04
  • Edition : 1
    Number of pages : 2
  • :
    ISO/TC 47
  • 71.080.70

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