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
PROJECT
ISO/FDIS 5314
50.00
Final text received or FDIS registered for formal approval
Jun 1, 2026