Tagasi

ISO 1592:1977

Urea for industrial use -- Determination of nitrogen content -- Titrimetric method after distillation

Üldinfo
Kehtetu alates 27.05.2002
Direktiivid või määrused
puuduvad
Standardi ajalugu
Staatus
Kuupäev
Tüüp
Nimetus
Põhitekst
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.
*
*
*
PDF
41,96 € koos KM-ga
Paber
41,96 € koos KM-ga
Standardi monitooring