Please use this identifier to cite or link to this item: http://scholarbank.nus.edu.sg/handle/10635/13165
Title: Development and application of hollow fiber-protected liquid-phase microextraction for trace organic analysis
Authors: WU JINGMING
Keywords: hollow fiber-protected liquid-phase microextraction; ion-pair extraction; GC-MS; HPLC-UV; dynamic liquid-phase microextraction; trace organic analysis
Issue Date: 14-Apr-2008
Source: WU JINGMING (2008-04-14). Development and application of hollow fiber-protected liquid-phase microextraction for trace organic analysis. ScholarBank@NUS Repository.
Abstract: This study reports on the development and application of hollow fiber-protected liquid-phase microextarction (LPME) techniques to trace organic analysis.Firstly, three-phase hollow fiber-protected microextraction (LLLME) including static LLLME and dynamic LLLME combined with HPLC-UV were developed. In static LLLME, for the first time, orthogonal array designs were applied to optimize microextraction conditions for the analysis of three nonsteroidal anti-inflammatory drug residues. In dynamic LLLME mode, phenoxy acid herbicides were used as model compounds. The method provided up-to 490-fold enrichment within 13 min. Secondly, ion-pair hollow fiber-protected twob phase LPME combined with injection-port derivatization was developed to determine trace polar organic compounds in aqueous samples by GC-MS. Trace acidic herbicides and long-chain fatty acids in water samples were successfully determined by static mode and dynamic mode, respectively.Finally, a novel microextraction method termed in-fiber ion-pair formation combined with hollow fiber-protected LPME was developed and applied for the analysis of acidic herbicides.
URI: http://scholarbank.nus.edu.sg/handle/10635/13165
Appears in Collections:Ph.D Theses (Open)

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