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J Chromatogr A

Title:		Dynamic hollow fiber-supported headspace liquid-phase microextraction
Author(s):		Jiang X; Basheer C; Zhang J; Lee HK;
Address:		"Department of Chemistry, National University of Singapore, 3 Science Drive 3, Singapore 117543, Singapore"
Journal Title:		J Chromatogr A
Year:		2005
Volume:		1087
Issue:		1-Feb
Page Number:		289 - 294
DOI:		10.1016/j.chroma.2005.06.010
ISSN/ISBN:		0021-9673 (Print) 0021-9673 (Linking)
Abstract:		"With the increasing concern over deteriorating environmental quality, the analysis of organic pollutants in air, water, and soil has become critically important. The development of simple, efficient, and inexpensive analytical sample pretreatment is crucial for monitoring and evaluating the environment. In this work, a dynamic hollow-fiber supported headspace liquid-phase microextraction (DHF-HS-LPME) approach was developed. In dynamic LPME, the extracting solvent is held within a hollow fiber, affixed to a syringe needle and immersed in the sample solution, and is moved to-and-fro by using a programmable syringe pump. The movement facilitates mass transfer from the sample to the solvent. Here, a similar approach was adopted, except that extraction was from the headspace rather than by direct immersion. Analysis of the extract was carried out by gas chromatography-mass spectrometry. The effect of sampling temperature, water, salt, dwelling time were investigated. Results indicated that this novel headspace microextraction method gave good analyte-enrichment factors, linear range, limits of detection and repeatability, all of which were evaluated by extracting PAHs from soil samples. This technique represents an inexpensive, convenient, fast and simple sample preparation of this class of semi-volatile organic compounds"
Keywords:		"Chromatography, Liquid/*instrumentation/methods Gas Chromatography-Mass Spectrometry Salts/chemistry Solvents/chemistry Temperature;"
Notes:		"MedlineJiang, Xianmin Basheer, Chanbasha Zhang, Jie Lee, Hian Kee eng Research Support, Non-U.S. Gov't Netherlands 2005/09/01 J Chromatogr A. 2005 Sep 16; 1087(1-2):289-94. doi: 10.1016/j.chroma.2005.06.010"