Abstract 

Two cases are considered: content of nitrous compounds, expressed as HNO2, equal to or greater than 0,01 % (m/m) and content of nitrous compounds, expressed as HNO2, less than 0,01 % (m/m). The principle consists in oxidatiuon of the compounds present in a test portion by an excess of standard volumetric potassium permanganate solution. Addition of an excess of a standard volumetric iron(II) sulphate solution, and titration of this excess with a standard volumetric potassium permanganate solution. Replaces ISO Recommendation R 1981-1971.


General information

  • Status :  Withdrawn
    Publication date : 1977-11
  • Edition : 1
    Number of pages : 3
  • :
    ISO/TC 47
    Chemistry
  • 71.060.30
    Acids

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