ISO 7408:1983 Preview

Fertilizers -- Determination of ammoniacal nitrogen content in the presence of other substances which release ammonia when treated with sodium hydroxide -- Titrimetric method

The method consists in entraining, by means of a strong current of air, of the ammonia from a moderately alkaline test mixture at ambient temperature into standard volumetric sulfuric acid solution, and back-titrating of the excess sulfuric acid solution with standard volumetric sodium hydroxide solution.


General information

  • Status :  Published
    Publication date : 1983-12
  • Edition : 1
    Number of pages : 5
  • :
    ISO/TC 134
    Fertilizers, soil conditioners and beneficial substances
  • 65.080
    Fertilizers

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  • Now confirmed
    ISO 7408:1983

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