Fertilizers — Determination of ammoniacal nitrogen content — Titrimetric method after distillation
NORMA vydaná dňa 1.5.1981
Označenie normy: ISO 5314:1981
Dátum vydania normy: 1.5.1981
Počet strán: 4
Približná hmotnosť: 12 g (0.03 libier)
Krajina: Medzinárodná technická norma
Kategória: Technické normy ISO
Description / Abstract: The method consists in distilling of the ammonia from an alkaline solution, absorbing in an excess of standard volumetric sulphuric acid solution and back-titrating with standard volumetric sodium hydroxide solution. It is applicable only in the absence of urea or its derivatives, of cyanamide and of organic nitrogenous compounds.