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• W2000371785 abstract "Abstract A method was developed for viable and rapid determination of seven polychlorinated biphenyls (PCBs) in water samples with vortex‐assisted liquid–liquid microextraction (VALLME) using gas chromatography‐mass spectrometry (GC‐MS). At first, the most suitable extraction solvent and extraction solvent volume were determined. Later, the parameters affecting the extraction efficiency such as vortex extraction time, rotational speed of the vortex, and ionic strength of the sample were optimized by using a 2 3 factorial experimental design. The optimized extraction conditions for 5 mL water sample were as follows: extractant solvent 200 μL of chloroform; vortex extraction time of 2 min at 3000 rpm; centrifugation 5 min at 4000 rpm, and no ionic strength. Under the optimum condition, limits of detection (LOD) ranged from 0.36 to 0.73 ng/L. Mean recoveries of PCBs from fortified water samples are 96% for three different fortification levels and RSDs of the recoveries are below 5%. The developed procedure was successfully applied to the determination of PCBs in real water and wastewater samples such as tap, well, surface, bottled waters, and municipal, treated municipal, and industrial wastewaters. The performance of the proposed method was compared with traditional liquid–liquid extraction (LLE) of real water samples and the results show that efficiency of proposed method is comparable to the LLE. However, the proposed method offers several advantages, i.e. reducing sample requirement for measurement of target compounds, less solvent consumption, and reducing the costs associated with solvent purchase and waste disposal. It is also viable, rapid, and easy to use for the analyses of PCBs in water samples by using GC‐MS." @default.
• W2000371785 created "2016-06-24" @default.
• W2000371785 creator A5059945957 @default.
• W2000371785 date "2011-01-31" @default.
• W2000371785 modified "2023-10-18" @default.
• W2000371785 title "Analyses of polychlorinated biphenyls in waters and wastewaters using vortex-assisted liquid-liquid microextraction and gas chromatography-mass spectrometry" @default.
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• W2000371785 doi "https://doi.org/10.1002/jssc.201000623" @default.
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