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Determination of volatile organic compounds in water using ultrasound‐assisted emulsification microextraction followed by gas chromatography
Author(s) -
Leong MeiI.,
Huang ShangDa
Publication year - 2012
Publication title -
journal of separation science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.72
H-Index - 102
eISSN - 1615-9314
pISSN - 1615-9306
DOI - 10.1002/jssc.201100610
Subject(s) - chromatography , extraction (chemistry) , chemistry , gas chromatography , tap water , detection limit , solvent , gas chromatography–mass spectrometry , sonication , mass spectrometry , analyte , sample preparation , organic chemistry , environmental engineering , engineering
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 |mL 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 mL 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.