Please use this identifier to cite or link to this item: http://scholarbank.nus.edu.sg/handle/10635/13924
Title: Development and application of liquid-phase microextraction techniques in the analysis of environmental pollutants
Authors: HOU LI
Keywords: liquid-phase microextraction, sample preconcentration techniques, environmental pollutants, GC/MS, HPLC, CE.
Issue Date: 6-Jul-2004
Source: HOU LI (2004-07-06). Development and application of liquid-phase microextraction techniques in the analysis of environmental pollutants. ScholarBank@NUS Repository.
Abstract: This work focuses on the development and application of two kinds of liquid-phase microextraction techniques. One is drop-based solvent microextraction including static liquid-phase microextraction (extraction solvent drop remains static during extraction) and dynamic liquid-phase microextraction (extraction solvent plug is agitated during extraction). Another microextraction approach involves the use of hollow fiber combination with liquid-phase microextraction. It can be categorized into two-phase microextraction, and three-phase microextraction. By using hollow fiber membrane, the organic solvent is held and protected by the membrane during the extraction process. Hence the precision and stability of the methods are increased significantly. Also, sample clean-up is possible by using this method because of the selectivity of the hollow fiber so that it can be applied to a??dirtya?? samples such as soil slurries and biological fluids, etc. The results presented in this thesis show that all the liquid-phase microextraction techniques can serve as excellent alternative methods to conventional sample preparation techniques.
URI: http://scholarbank.nus.edu.sg/handle/10635/13924
Appears in Collections:Ph.D Theses (Open)

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