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Talanta

Title:		Headspace in-tube microextraction coupled with micellar electrokinetic chromatography of neutral aromatic compounds
Author(s):		Cho SM; Park BS; Jung WS; Lee SW; Jung Y; Chung DS;
Address:		"Department of Chemistry, Seoul National University, Seoul 151-747, Republic of Korea. Seoul Science High School, Seoul 110-530, Republic of Korea. Department of Chemistry, Seoul National University, Seoul 151-747, Republic of Korea. Electronic address: dschung@snu.ac.kr"
Journal Title:		Talanta
Year:		2016
Volume:		20151121
Issue:
Page Number:		729 - 733
DOI:		10.1016/j.talanta.2015.11.035
ISSN/ISBN:		1873-3573 (Electronic) 0039-9140 (Linking)
Abstract:		"Headspace (HS) extraction can be carried out easily and aptly via single drop microextraction coupled with capillary electrophoresis (CE). However, one drawback is the difficulty of keeping the single drop stably at the capillary tip. To solve this problem, we have recently demonstrated HS in-tube microextraction (ITME) of acidic compounds such as chlrophenols in an acidic sample using a basic run buffer plug in the separation capillary for CE as an acceptor phase. In this report, an organic acceptor plug in a capillary was used to extract neutral organic volatile pollutants such as BTEX (benzene, toluene, ethylbenzene, and m-xylene). After extraction, the analytes enriched in the organic acceptor plug were analyzed with micellar electrokinetic chromatography (MEKC). The enrichment factors for BTEX in a standard solution were up to 350 under an optimal condition of 25 degrees C for 20 min. As an application, BTEX spiked into bottled water were analyzed with HS-ITME-MEKC, and the enrichment factors for BTEX were up to 320. The limits of detections were 1-4 ppb, which are at least 200 times lower than the US Environmental Protection Agency guidelines for drinking water, except benzene. The entire procedure of HS-ITME-MEKC was carried out automatically using a commercial CE instrument"
Keywords:		"Chromatography, Micellar Electrokinetic Capillary/*methods Hydrocarbons, Aromatic/*analysis/chemistry Solid Phase Microextraction/*methods Btex Capillary electrophoresis Headspace extraction In-tube microextraction;"
Notes:		"MedlineCho, Sung Min Park, Bum Su Jung, Woo Sung Lee, Sang Won Jung, Yunhwan Chung, Doo Soo eng Research Support, Non-U.S. Gov't Netherlands 2015/12/15 Talanta. 2016 Feb 1; 148:729-33. doi: 10.1016/j.talanta.2015.11.035. Epub 2015 Nov 21"