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ISO/DIS 5314

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

General information

40.60     Oct 3, 2025

ISO

ISO/TC 134

International Standard

65.080  

Scope

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.

Life cycle

PREVIOUSLY

PUBLISHED
ISO 5314:1981

NOW

PROJECT
ISO/DIS 5314
40.60 Close of voting
Oct 3, 2025