Please use this identifier to cite or link to this item: http://scholarbank.nus.edu.sg/handle/10635/43726
Title: Development of Environmentally Friendly Dispersive Liquid-Liquid Microextraction Techniques
Authors: ZHANG YUFENG
Keywords: Sample preparation, water samples, dispersive liquid-liquid microextraction, gas chromatography-mass spectrometry
Issue Date: 11-Mar-2013
Source: ZHANG YUFENG (2013-03-11). Development of Environmentally Friendly Dispersive Liquid-Liquid Microextraction Techniques. ScholarBank@NUS Repository.
Abstract: This thesis focuses on the development of miniaturized and environmentally friendly dispersive liquid-liquid microextraction (DLLME) techniques for some important analytes of environmental concern. To avoid the use of large amount of toxic dispersive solvent, a simple solvent microextraction method termed vortex-assisted DLLME is studied. In order to avoid the use of relatively high toxic and high density chlorinated solvent in traditional DLLME and our previous work on VADLLME, the application of relatively low toxic ILs and lighter-than-water solvent as the extraction solvents in DLLME have been explored subsequently. To further improve the dispersion of low-density organic solvent to the aqueous sample in an even faster and more efficient way, low-density solvent-based vortex-assisted surfactant-enhanced DLLME has been investigated. The results presented in this thesis show that all the DLLME techniques could serve as excellent alternative methods to conventional sample preparation techniques in the analysis of trace organic pollutants in aqueous samples.
URI: http://scholarbank.nus.edu.sg/handle/10635/43726
Appears in Collections:Ph.D Theses (Open)

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