| Title: | Analysis of semi-volatile organic compounds in aqueous samples by microwave-assisted headspace solid-phase microextraction coupled with gas chromatography-electron capture detection |
| Author(s): | Huang Y; Yang YC; Shu YY; |
| Address: | "Department of Chemistry, National Kaohsiung Normal University, Kaohsiung 802, Taiwan" |
| DOI: | 10.1016/j.chroma.2006.11.074 |
| ISSN/ISBN: | 0021-9673 (Print) 0021-9673 (Linking) |
| Abstract: | "The pretreatment technique of microwave-assisted headspace solid-phase microextraction (MA-HS-SPME) has been developed and studied for the extraction of semi-volatile organic compounds (SVOCs) in aqueous samples prior to chromatographic analysis. The optimum conditions for obtaining extraction efficiency, such as the extraction time, extraction temperature, addition of salts, and the ratio of sample to headspace volume parameters were investigated. Experimental results indicated that the proposed MA-HS-SPME technique attained the best extraction efficiency under the optimized conditions, i.e., irradiation of extraction solution (20mL aqueous sample in 40mL headspace vial with no addition of salt) under 30W microwave power for 30min at 70 degrees C. The detection was linear at 1-250ng/L with correlation coefficient exceeding 0.997. The detection limits obtained were between 0.2-10.7ng/L, repeatability range from 2 to 15%. Real water samples collected from known sites in southern Taiwan were analyzed using the optimized conditions" |
| Keywords: | "Chlorobenzenes/analysis Chromatography, Gas/*methods Dinitrobenzenes/analysis Electrons *Microwaves Organic Chemicals/*analysis Sodium Chloride/chemistry Solid Phase Microextraction/*methods Solutions/analysis Temperature Volatilization;" |
| Notes: | "MedlineHuang, Yaping Yang, Yu-Chuan Shu, Youn Yuen eng Comparative Study Research Support, Non-U.S. Gov't Netherlands 2006/12/13 J Chromatogr A. 2007 Jan 26; 1140(1-2):35-43. doi: 10.1016/j.chroma.2006.11.074. Epub 2006 Dec 11" |
