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dnaSRPS CEN/TS 17789-1:2021

Organo-mineral fertilizers - Identification of chelating agents - Part 1: Determination of EDTA, HEEDTA and DTPA by ion chromatography

General information

50.60     Dec 20, 2021



Technical Specification



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 organo-mineral fertilizers, having an organic matrix based on vegetal residues (cocoa shells, grape residue, soybean residue, ...), algae extract, and animal meal (feather, bones, blood, ...) and containing one or more of these substances.
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 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 %.

Related directives

Directives related to this standard.


Life cycle


dnaSRPS CEN/TS 17789-1:2021
50.60 Close of voting. Proof returned by secretariat
Dec 20, 2021

Related project

Adopted from CEN/TS 17789-1:2022