Tandem use of solid-phase extraction and dispersive liquid-liquid microextraction for the determination of mononitrotoluenes in aquatic environment.

Détails

ID Serval
serval:BIB_641438BC44E7
Type
Article: article d'un périodique ou d'un magazine.
Collection
Publications
Institution
Titre
Tandem use of solid-phase extraction and dispersive liquid-liquid microextraction for the determination of mononitrotoluenes in aquatic environment.
Périodique
Journal of Separation Science
Auteur(s)
Sobhi H.R., Farahani H., Kashtiaray A., Farahani M.R.
ISSN
1615-9314 (Electronic)
ISSN-L
1615-9306
Statut éditorial
Publié
Date de publication
2011
Volume
34
Numéro
9
Pages
1035-1040
Langue
anglais
Résumé
Solid-phase extraction (SPE) in tandem with dispersive liquid-liquid microextraction (DLLME) has been developed for the determination of mononitrotoluenes (MNTs) in several aquatic samples using gas chromatography-flame ionization (GC-FID) detection system. In the hyphenated SPE-DLLME, initially MNTs were extracted from a large volume of aqueous samples (100 mL) into a 500-mg octadecyl silane (C(18) ) sorbent. After the elution of analytes from the sorbent with acetonitrile, the obtained solution was put under the DLLME procedure, so that the extra preconcentration factors could be achieved. The parameters influencing the extraction efficiency such as breakthrough volume, type and volume of the elution solvent (disperser solvent) and extracting solvent, as well as the salt addition, were studied and optimized. The calibration curves were linear in the range of 0.5-500 μg/L and the limit of detection for all analytes was found to be 0.2 μg/L. The relative standard deviations (for 0.75 μg/L of MNTs) without internal standard varied from 2.0 to 6.4% (n=5). The relative recoveries of the well, river and sea water samples, spiked at the concentration level of 0.75 μg/L of the analytes, were in the range of 85-118%.
Pubmed
Web of science
Création de la notice
08/06/2011 10:51
Dernière modification de la notice
20/08/2019 15:20
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