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
50.20
Proof sent to secretariat or FDIS ballot initiated: 8 weeks
Sep 15, 2026
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