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.
Status: PublishedPublication date: 1981-05
Edition: 1Number of pages: 4
Technical Committee: ISO/TC 134 Fertilizers, soil conditioners and beneficial substances
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