ISO 5314:1981
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Fertilizers — Determination of ammoniacal nitrogen content — Titrimetric method after distillation
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English, French
01-05-1981
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.
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