Fertilizers - Determination of chelating agents - Determination of iron chelated by EDDHSA by ion pair chromatography

Le présent document spécifie une méthode par chromatographie qui permet de déterminer la quantité totale de fer chélaté par EDDHSA dans les produits du commerce.

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Main informations

Collections

National standards and national normative documents

Publication date

October 2008

Number of pages

19 p.

Reference

NF EN 15451

ICS Codes

65.080 Fertilizers

Classification index

U42-508

Print number

1 - octobre 2008

European kinship

EN 15451:2008

Sumary

Fertilizers - Determination of chelating agents - Determination of iron chelated by EDDHSA by ion pair chromatography

Le présent document spécifie une méthode par chromatographie qui permet de déterminer la quantité totale de fer chélaté par EDDHSA dans les produits du commerce.

Table of contents

Avant-propos
3
1 Domaine d'application
4
2 Références normatives
4
3 Principe
4
4 Interférences
4
5 Réactifs
4
5.1 Généralités
4
5.2 Solution d'hydroxyde de sodium, c(NaOH) = 0,5 mol/l
4
5.3 Solution d'hydroxyde de sodium, c(NaOH) = 0,1 mol/l
5
5.4 Solution d'acide chlorhydrique, c(HCI) = 1,0 mol/l
5
5.5 Solution d'acide chlorhydrique, c(HCI) = 0,1 mol/l
5
5.6 Solution de nitrate de fer (III), p(Fe) = 1 050 mg/l
5
5.7 Solution de Fe3+/EDDHSA, P(Fe) = 100 mg/l
5
5.8 Éluant pour le dosage
5
6 Appareillage
6
6.1 Généralités
6
6.2 Agitateur magnétique
6
6.3 Chromatographe
6
6.4 Membranes filtrantes
6
7 Échantillonnage et préparation de l'échantillon
7
8 Mode opératoire
7
8.1 Préparation de la solution échantillon de chélates de fer
7
8.2 Préparation des solutions d'étalonnage
7
8.3 Analyse chromatographique
7
9 Expression des résultats
8
9.1 Fe dans les chélates de Fe
8
10 Fidélité pour le Fe 3+/EDDHSA
8
10.1 Essai interlaboratoires
8
10.2 Répétabilité
8
10.3 Reproductibilité
8
11 Rapport d'essai
9
Annexe A (informative) Chromatogramme pour le Fe3+/EDDHSA
10
Annexe B (informative) Spectres UV-visible pour le Fe 3+/EDDHSA
11
Annexe C (informative) Résultats des essais interlaboratoires
12
Annexe D (informative) Noms complets des agents chélatants
14
Bibliographie
15

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