Reference number
ISO 3330:1975
ISO 3330:1975
Ammonium nitrate for industrial use — Determination of ammoniacal nitrogen content — Titrimetric method after distillation
Edition 1
1975-07
Retirada
ISO 3330:1975
8595
Retirada (Edición 1, 1975)

Resumen

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.

Informaciones generales

  •  : Retirada
     : 1975-07
    : Retirada de la Norma Internacional [95.99]
  •  : 1
     : 4
  • ISO/TC 47
    71.060.50 
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