ISO 5314:1981

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Fertilizers - Determination of ammoniacal nitrogen content - Titrimetric method after distillation

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ISO 5314:1981

Fertilizers - Determination of ammoniacal nitrogen content - Titrimetric method after distillation

PUBLISH DATE 1981
ISO 5314:1981

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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