Reference number
ISO 1592:1977
ISO 1592:1977
Urea for industrial use — Determination of nitrogen content — Titrimetric method after distillation
Edition 1
1977-11
Retirada
ISO 1592:1977
6183
Retirada (Edición 1, 1977)

Resumen

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.

Informaciones generales

  •  : Retirada
     : 1977-11
    : Retirada de la Norma Internacional [95.99]
  •  : 1
     : 4
  • ISO/TC 47
    71.080.30 
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