ISO-5314 Fertilizers - Determination of ammoniacal nitrogen content - Titrimetric method after distillation

ISO-5314 - 1ST EDITION - CURRENT


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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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Document Number

ISO 5314:1981

Revision Level

1ST EDITION

Status

Current

Publication Date

May 15, 1981

Committee Number

ISO TC 134/SC 4