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ISO 22018:2021

Fertilizers, soil conditioners and beneficial substances — Determination of EDTA soluble phosphorus content in inorganic fertilizers

Jul 7, 2021

General information

90.20     Jul 15, 2026

ISO

ISO/TC 134

International Standard

65.080  

English  

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Scope

This document specifies the method for the determination of the EDTA soluble phosphorus content of inorganic fertilizers. The method is applicable for fertilizers composed of or blended from multiple sources such as superphosphate, ammonium phosphate, triple superphosphate, and/or nitrophosphate. It is not suitable for fertilizers containing calcium magnesium phosphates.

Life cycle

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PUBLISHED
ISO 22018:2021
90.20 Standard under periodical review
Jul 15, 2026

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