Please use this identifier to cite or link to this item: http://hdl.handle.net/11455/34107
標題: Determination of benzene, toluene, ethylbenzene, xylenes in water at sub-ng l(-1) levels by solid-phase microextraction coupled to cryo-trap gas chromatography-mass spectrometry
作者: Lee, M.R.
李茂榮
Chang, C.M.
Dou, J.P.
關鍵字: solid-phase microextraction
benzene
toluene
ethylbenzene
xylene
cryo-trap
volatile organic-compounds
flame ionization detection
tert.-butyl
ether
substituted benzenes
aqueous samples
headspace
btex
extraction
groundwater
acrylamide
期刊/報告no:: Chemosphere, Volume 69, Issue 9, Page(s) 1381-1387.
摘要: A trace analytical method of benzene, toluene, ethylbenzene and xylenes (BTEX) in water has been developed by using headspace solid-phase microextraction (HS-SPME) coupled to cryo-trap gas chromatography-mass spectrometry (GC-MS). The chromatographic peak shape for BTEX was improved by using cryo-trap equipment. The HS-SPME experimental procedures to extract BTEX from water were optimized with a 75 pm carboxen/polydimethylsiloxane (CAR/PDMS)-coated fiber at a sodium chloride concentration of 267 g 1(-1), extraction for 15 min at 25 degrees C and desorption at 290 degrees C for 2 min. Good linearity was verified in a range of 0.0001-50 mu g 1(-1) for each analyte (r(2) = 0.996-0.999). The limits of detection (LODs) of BTEX in water reached at sub-ng 1(-1) levels. LODs of benzene, toluene, ethylbenzene, m/p-xylene and o-xylene were 0.04, 0.02, 0.05, 0.01 and 0.02 ng 1-1, respectively. The proposed analytical method was successfully used for the quantification of trace BTEX in ground water. The results indicate that HS-SPME coupled to cryo-trap GC-MS is an effective tool for analysis of BTEX in water samples at the sub-ng 1(-1) level. (C) 2007 Elsevier Ltd. All rights reserved.
URI: http://hdl.handle.net/11455/34107
ISSN: 0045-6535
文章連結: http://dx.doi.org/10.1016/j.chemosphere.2007.05.004
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