Abstract 

The procedure is based on the catalytic conversion of nitrogen present in a test portion to ammonia by heating in concentrated sulphuric acid solution. Distillation and absorption of the ammonia in an excess of standard volumetric sulphuric acid solution and back-titration with standard volumetric sodium hydroxide solution in the presence of an indicator. - Replaces ISO Recommendation R 1592-1970.


General information

  • Status :  Withdrawn
    Publication date : 1977-11
  • Edition : 1
    Number of pages : 4
  • :
    ISO/TC 47
    Chemistry
  • 71.080.30
    Organic nitrogen compounds

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