Fertilizers — Determination of ammoniacal nitrogen content — Titrimetric method after distillation
NORM herausgegeben am 1.5.1981
Bezeichnung normen: ISO 5314:1981
Ausgabedatum normen: 1.5.1981
Zahl der Seiten: 4
Gewicht ca.: 12 g (0.03 Pfund)
Land: Internationale technische Norm
Kategorie: Technische Normen 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.