prSRPS EN 13368-1:2026

Fertilizers — Identification of chelating agents — Part 1: Determination of EDTA, HEEDTA and DTPA by ion chromatography

Scope

This document specifies a method for the determination by ion chromatography of the total amount of each of the individual chelating agents EDTA, HEEDTA, and DTPA in inorganic fertilizers and EDTA and DTPA in organo-mineral fertilizers.

The method allows the identification and the determination of the total water-soluble fraction of each of these chelating agents. It does not allow to distinguish between the free form and the metal bound form of the chelating agents.
This method applies to inorganic and organo-mineral fertilizers containing chelates of one or more of the following micronutrients: cobalt, copper, iron, manganese, zinc and with a mass fraction of at least 0,1 %.

This document is applicable to fertilizing product blends, where the blend is a mix of at least two of the following components: fertilizers, liming materials, soil improvers, growing media, inhibitors, plant biostimulants, and where the following category: inorganic fertilizers or organo-mineral fertilizers is the highest % in the blend by mass or volume, or in the case of liquid form by dry mass.

Additional information on eventual interferences in fertilizing product blends is provided in Clause 5.

Related directives

NOTE: If the word "harmonized" (marked in green) is not found in the field with the name of the directive, it means that the European standard is not cited in the OJEU.