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Titre du document / Document title

Optimisation of the analytical detection of EDTA by HPLC in natural waters

Auteur(s) / Author(s)

LOYAUX-LAWNICZAK S. (1) ; DOUCH J. (1) ; BEHRA P. (1 2) ;

Affiliation(s) du ou des auteurs / Author(s) Affiliation(s)

(1) Institut de Mécanique des Fluides, UMR 7507 Université Louis Pasteur-CNRS, 2, rue Boussingault, 67000 Strasbourg, FRANCE
(2) Ibnou Zohr University, Department of Chemistry, BP 28/S, 80000 Agadir, MAROC

Résumé / Abstract

Reversed-phase ion-pair liquid chromatography is often used to analyse traces of EDTA in natural water samples. Some perturbations due to the presence of major anions in samples, which can compete for ion pair formation with the Fe-EDTA complex used for the detection, have been observed but never estimated and quantified. A new operational method for determining EDTA in natural water samples is proposed by taking into account anion interactions. Qualitative and quantitative analyses of EDTA were performed with a synthetic water at various ionic strengths. From the effect of the ionic strength controlled by CaCl2, the concentration of the counter-ion tetrabutylammonium bromide (TBA+Br-) and the methanol of the mobile phase, optimal analytical conditions were proposed for a better determination of EDTA concentration. The limit of detection without preconcentration and the reproducibility defined as relative standard deviation were 5 μg/L and 3.6% (n = 12), respectively. This method was applied to natural samples.

Revue / Journal Title

Fresenius' journal of analytical chemistry    ISSN  0937-0633 

Source / Source

1999, vol. 364, no8, pp. 727-731 (19 ref.)

Langue / Language

Anglais

Editeur / Publisher

Springer, Berlin, ALLEMAGNE  (1990-2001) (Revue)

Mots-clés anglais / English Keywords

HPLC chromatography

;

Trace analysis

;

Preconcentration

;

Counter ion

;

Detection limit

;

Reproducibility

;

Standard deviation

;

Water

;

EDTA

;

Mots-clés français / French Keywords

Chromatographie HPLC

;

Analyse trace

;

Préconcentration

;

Ion antagoniste

;

Limite détection

;

Reproductibilité

;

Ecart type

;

Eau

;

EDTA

;

Mots-clés espagnols / Spanish Keywords

Cromatografía HPLC

;

Análisis huella

;

Preconcentración

;

Ion antagonista

;

Límite detección

;

Reproductividad

;

Desviación típica

;

Agua

;

EDTA

;

Localisation / Location

INIST-CNRS, Cote INIST : 853, 35400008961345.0120

Nº notice refdoc (ud4) : 1898737



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