GSO ISO 25475:2021
Gulf Standard
Current Edition
Approved on
01 July 2021
Fertilizers — Determination of ammoniacal nitrogen
GSO ISO 25475:2021 Files
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GSO ISO 25475:2021 Scope
ISO 25475:2016 specifies a method for the determination of the ammoniacal nitrogen content in fertilizers. The method is applicable to all nitrogenous fertilizers including compound fertilizers, in which nitrogen is found exclusively either in the form of ammonium salts or ammonium salts together with nitrates.
ISO 25475:2016 is not applicable to fertilizers containing urea, cyanamide or other organic nitrogenous compounds.
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