PD CEN/TS 17764:2022 PDF

1   Scope This document specifies the method for the determination of free, chelated or complexed micronutrients and chelating and/or complexing agents present in compound inorganic micronutrient fertilizers. This method applies to compound inorganic micronutrient fertilizers when micronutrients are chelated and/or complexed. The method is based on the determination of the following specific parameters 1 :

— the water-soluble micronutrient concentration;

— the fraction of chelated micronutrients in relation;

— identification of chelating agents EDTA, DTPA, HEEDTA, IDHA, [S,S]–EDDS, [o,o] EDDHA, [o,o] EDDHMA, [o,p] EDDHA, HBED and EDDHSA;

— the fraction of complexed micronutrients;

— identification of complexing agents (lignosulfonates, heptagluconic acid (HGA)).

The method is based on

— ICP (inductive coupled plasma) or FAAS (flame atomic absorption spectrometry) measurement of the concentration of water-soluble micronutrients according to EN 16963 or EN 16965 after extraction according to EN 16962;

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