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ISO 17319:2015

Fertilizers and soil conditioners — Determination of water-soluble potassium content — Potassium tetraphenylborate gravimetric method

Publication date:   May 27, 2015

General information

90.93   Standard confirmed   Dec 3, 2025

ISO

ISO/TC 134 Fertilizers, soil conditioners and beneficial substances

International Standard

65.080   Fertilizers

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Scope

ISO 17319:2015 specifies a gravimetric method for the determination of the water-soluble potassium content of test solutions of fertilizers. It is suitable for use in arbitration and for reference purposes.
ISO 17319:2015 is applicable to those fertilizers containing more than 1,0 % K2O or equivalent amount of K content.

Life cycle

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PUBLISHED
ISO 17319:2015
90.93 Standard confirmed
Dec 3, 2025