BS EN 13368-3:2017 - Fertilizers. Determination of chelating agents in fertilizers by chromatography. Determination of [S,S]-EDDS by ion pair chromatography

BS EN 13368-3:2017

Fertilizers. Determination of chelating agents in fertilizers by chromatography. Determination of [S,S]-EDDS by ion pair chromatography

Status : Current   Published : January 2018

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This European Standard specifies a method for the chromatographic determination of the chelating agent [S,S]-EDDS in fertilizers. The method allows the identification and the determination of the total concentration of the water-soluble fraction of this chelating agent. It does not allow distinguishing between the free form and the metal bound form of the chelating agent. This method is applicable to EC fertilizers containing chelates of one or more of the following micro-nutrients: cobalt, copper, iron, manganese and zinc, covered by Regulation (EC) No 2003/2003 [4]. It is applicable to a mass fraction of the metal chelated of at least 0,35 %. NOTE 1 The substance EDDS (ethylenediamine-N,N'-disuccinic acid) exists as several different stereo isomeric forms. [S,S] (with CAS Number 20846–91–7), [R,R] and [R,S] optical isomers are possible. [S,S] and [R,R] are mirror images with equal chemical characteristics. However only the [S,S] isomer is biodegradable. When both are present, they form the racemic mixture. The [R,S] isomer (the meso isomer) is only slowly biodegradable. Only the [S,S]-EDDS isomer is allowed by the Regulation (EC) No 2003/2003. Since the Cu chelate of the [R,R]-EDDS isomer presents the same stability than the [S,S]-EDDS, both should coelute. The absence of [R,S]-EDDS indicates that only a pure isomer ([S,S] or [R,R]) exist. An additional test based on polarimetry can be used to ascertain the isomeric characteristic of the sample, or the standard.




Standard NumberBS EN 13368-3:2017
TitleFertilizers. Determination of chelating agents in fertilizers by chromatography. Determination of [S,S]-EDDS by ion pair chromatography
StatusCurrent
Publication Date05 January 2018
Normative References(Required to achieve compliance to this standard)EN 12944-2:1999, EN 12944-1:1999, EN 13366:2001, ISO 3696, EN 1482-2, EN ISO 3696
Informative References(Provided for Information)ISO/IEC 5725-2:1994, CEN/TR 15106, EN 1482-1
International RelationshipsEN 13368-3:2017
Draft Superseded By18/30344448 DC
DescriptorsDetermination of content, Ions, Chromatography, Chelating agents, Fertilizers
ICS65.080
Title in FrenchEngrais. Détermination des agents chélatants dans les engrais par chromatographie Détermination du [S,S]-EDDS par chromatographie d'appariement d'ions
Title in GermanDüngemittel. Bestimmung von Chelatbildnern in Düngemitteln mit Chromatographie Bestimmung von [S,S]-EDDS mit Ionen- Paarchromatographie
CommitteeCII/37
ISBN978 0 580 94825 1
PublisherBSI
FormatA4
DeliveryYes
Pages24
File Size664 KB
Price£182.00


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