Pretreatment of the water used, freshly boiled and cooled, by neutralization by addition of the standard volumetric sodium hydroxide solution or sulphuric acid solution as required. Addition of the test portion and titration with the standard volumetric sodium hydroxide solution in presence of phenolphthalein as indicator until the apperance of a pale pink colour.

General information

  • Status :  Withdrawn
    Publication date : 1973-12
  • Edition : 1
    Number of pages : 2
  • :
    ISO/TC 47
  • 71.080.80
    Aldehydes and ketones

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