Published
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.
PUBLISHED
ISO 5314:1981
90.92
Standard to be revised
Jun 19, 2023
IN_DEVELOPMENT
ISO/CD 5314
Fertilizers — Determination of ammoniacal nitrogen content — Titrimetric method after distillation
60.60 Standard published
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