Analysis of triazine herbicides using an up-and-down-shaker-assisted dispersive liquid-liquid microextraction coupled with gas chromatography-mass spectrometry.
J Chromatogr B Analyt Technol Biomed Life Sci
; 955-956: 116-23, 2014 Apr 01.
Article
em En
| MEDLINE
| ID: mdl-24631820
ABSTRACT
In dispersive liquid-liquid microextraction, a few hundred microliters to a few milliliters of water-miscible dispersive solvent are commonly used to assist emulsification in aqueous samples. In the present study, a consistent and automatic up-and-down-shaker-assisted dispersive liquid-liquid microextraction (UDSA-DLLME) that does not require a dispersive solvent was developed. The enrichment factors (EFs) of the targets obtained using the automatic shaker were 361-1391 for UDSA-DLLME, 51-77 for ultrasonication, and 298-922 for vortexing. The linearity of the method was in the range 0.2-200µgL(-1), and its limit of detections was within 0.02-0.04µgL(-1). The intraday and interday relative standard deviations ranged from 5.7 to 10.0% and 5.5 to 10.3%, respectively. The relative recoveries of river and lake samples spiked with 2.0µgL(-1) of triazines were 94.2-102.2% and 98.5-104.1%, respectively. The technique provided high repeatability and recovery. No matrix interference from river and lake water was observed. The method also achieved high EFs compared with those obtained through other emulsification methods such as vortexing and ultrasonication. UDSA-DLLME is an alternative sample preparation technique with good performance.
Palavras-chave
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Triazinas
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Poluentes Químicos da Água
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Microextração em Fase Líquida
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Herbicidas
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Cromatografia Gasosa-Espectrometria de Massas
Tipo de estudo:
Prognostic_studies
Idioma:
En
Revista:
J Chromatogr B Analyt Technol Biomed Life Sci
Ano de publicação:
2014
Tipo de documento:
Article