Abstract 

Based on dissolution of a test sample in water. Distillation of the ammonia after displacement by an alkali solution. Absorption in an excess of standard volumetric sulphuric acid solution and back-titration with standard volumetric sodium hydroxide solution in the presence of methyl red/methylene blue mixed indicator. A typical distillation apparatus is shown in a figure.


General information

  • Status :  Withdrawn
    Publication date : 1975-07
  • Edition : 1
    Number of pages : 4
  • Technical Committee
    :
    ISO/TC 47
    Chemistry
  • ICS :
    71.060.50
    Salts

Life cycle

A standard is reviewed every 5 years



Revisions / Corrigenda

  • Now withdrawn
    ISO 3330:1975

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