1 Scope
This European Standard specifies a method for the chromatographic determination of
the total amount of each of the individual chelating agents EDTA, HEEDTA, and DTPA
in fertilizers 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.
NOTE EDTA, HEEDTA and DTPA are abbreviations used in this European Standard for the sake of simplicity. For complete names see Annex A.
This method applies to fertilizers containing chelates of one or more of the following
micro-nutrients: cobalt, copper, iron, manganese, zinc and with a mass fraction of
at least 0,1 %.