BS EN 13368-2:2012 - Fertilizers. Determination of chelating agents in fertilizers by chromatography. Determination of Fe chelated by o,o-EDDHA, o,o-EDDHMA and HBED by ion pair chromatography

BS EN 13368-2:2012

Fertilizers. Determination of chelating agents in fertilizers by chromatography. Determination of Fe chelated by o,o-EDDHA, o,o-EDDHMA and HBED by ion pair chromatography

Status : Superseded, Withdrawn   Published : August 2012 Replaced By : BS EN 13368-2:2017

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This document specifies a method for the chromatographic determination of the iron chelated by each individual ortho(hydroxy)-ortho(hydroxy) isomer of the chelating agents [o,o] EDDHA, [o,o] EDDHMA and by HBED in fertilizers containing one or more of these substances, except for [o,o] EDDHMA and HBED mixes. The method allows the identification and the determination of the total concentration of water soluble iron chelates of these chelating agents. It does not determine the free form of the chelating agents. This method is applicable to EC fertilizers covered by Regulation (EC) No 2003/2003 [4]. It is applicable to a mass fraction of the metal chelated of at least 0,625 %. NOTE 1 The substances EDDHA (ethylenediamine-N,N’- di[(hydroxyphenyl)acetic acid] and EDDHMA (ethylenediamine-N,N’- di[(hydroxymethylphenyl)acetic acid] exist as several different isomeric forms. Positional isomers for the hydroxyl or methyl groups (in ortho, meta, and para positions) as well as stereo isomers (meso and dl-racemic forms) are known. Both meso and dl-racemic forms of the ortho,ortho-EDDHA and ortho,ortho-EDDHMA are positional isomers for the hydroxyl groups allowed by the Regulation (EC) No 2003/2003. Since para, meta and ortho methyl positional isomers of the EDDHMA present quite similar stability, they could be grouped: in the method here described the para, meta and ortho methyl positional isomers of the [o,o] EDDHMA are considered together. HBED (N,N´-bis(2-hydroxybenzyl)-ethylenediamine-N,N´-diacetic acid) does not present isomeric forms. NOTE 2 At present, analytically pure standards only exist for ortho,ortho-EDDHA, ortho,ortho-EDDHMA and HBED. All other substances being unavailable as a standard, the influence of their eventual presence in the samples (with respect to the sensitivity and the selectivity of this method) has not been studied. NOTE 3 The meso and the dl-racemic forms of [o,o] EDDHA and [o,o] EDDHMA can be determined separately by this method.




Standard NumberBS EN 13368-2:2012
TitleFertilizers. Determination of chelating agents in fertilizers by chromatography. Determination of Fe chelated by o,o-EDDHA, o,o-EDDHMA and HBED by ion pair chromatography
StatusSuperseded, Withdrawn
Publication Date31 August 2012
Withdrawn Date06 December 2017
Normative References(Required to achieve compliance to this standard)EN 12944-1:1999, EN 12944-2:1999, ISO 3696, EN 1482-2, EN ISO 3696
Informative References(Provided for Information)EN 1482-1, Regulation (EC) No 2003/2003, ISO 5725-2:1994, CEN/TR 15106
Replaced ByBS EN 13368-2:2017
ReplacesBS EN 13368-2:2007
International RelationshipsEN 13368-2:2012
Draft Superseded By11/30238479 DC
DescriptorsIsomers, Chemical analysis and testing, Chelating agents, Fertilizers, Determination of content, Iron, Liquid chromatography, Ion-exchange chromatography, Chromatography, Chemical reagents
ICS65.080
Title in FrenchEngrais. Détermination des agents chélatants dans les engrais par chromatographie. Détermination du fer chélaté o,o-EDDHA, o,o-EDDHMA et HBED par chromatographie d'appariement d'ions
Title in GermanDüngemittel. Bestimmung von Chelatbildnern in Düngemitteln mit Chromatographie. Bestimmung von Fe chelatisiertem o,o-EDDHA, o,o-EDDHMA und HBED mit lonen-Paarchromatographie
CommitteeCII/37
ISBN978 0 580 73762 6
PublisherBSI
FormatA4
DeliveryYes
Pages26
File Size487 KB
Price£182.00


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