Determination of volatile organic compounds in water using ultrasound-assisted emulsification microextraction followed by gas chromatography.
J Sep Sci
; 35(5-6): 688-94, 2012 Mar.
Article
em En
| MEDLINE
| ID: mdl-22271628
ABSTRACT
Volatile organic compounds (VOCs) are toxic compounds in the air, water and land. In the proposed method, ultrasound-assisted emulsification microextraction (USAEME) combined with gas chromatography-mass spectrometry (GC-MS) has been developed for the extraction and determination of eight VOCs in water samples. The influence of each experimental parameter of this method (the type of extraction solvent, volume of extraction solvent, salt addition, sonication time and extraction temperature) was optimized. The procedure for USAEME was as follows 15 µL of 1-bromooctane was used as the extraction solvent; 10 mL sample solution in a centrifuge tube with a cover was then placed in an ultrasonic water bath for 3 min. After centrifugation, 2 µL of the settled 1-bromooctane extract was injected into the GC-MS for further analysis. The optimized results indicated that the linear range is 0.1-100.0 µg/L and the limits of detection (LODs) are 0.033-0.092 µg/L for the eight analytes. The relative standard deviations (RSD), enrichment factors (EFs) and relative recoveries (RR) of the method when used on lake water samples were 2.8-9.5, 96-284 and 83-110%. The performance of the proposed method was gauged by analyzing samples of tap water, lake water and river water samples.
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Poluentes Químicos da Água
/
Cromatografia Gasosa
/
Compostos Orgânicos Voláteis
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Microextração em Fase Líquida
Tipo de estudo:
Evaluation_studies
Idioma:
En
Revista:
J Sep Sci
Ano de publicação:
2012
Tipo de documento:
Article