Reference number
ISO 2522:1974
ISO 2522:1974
Tritolyl phosphate for industrial use — Determination of apparent free phenols content — Volumetric method
Edition 1
1974-04
Retirada
ISO 2522:1974
7458
Retirada (Edición 1, 1974)

Resumen

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.

Informaciones generales

  •  : Retirada
     : 1974-04
    : Retirada de la Norma Internacional [95.99]
  •  : 1
     : 2
  • ISO/TC 47
    71.080.70 
  • RSS actualizaciones

¿Tiene alguna duda?

Consulte nuestras Ayuda y asistencia