Automated gas chromatography with cryogenic/sorbent trap for the measurement of volatile organic compounds in the atmosphere

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题名:	Automated gas chromatography with cryogenic/sorbent trap for the measurement of volatile organic compounds in the atmosphere
作者:	Wang,JL;Chen,SW;Chew,C
贡献者:	中央大學
关键词:	BIOGENIC HYDROCARBONS;NONMETHANE HYDROCARBONS;C2-C10 HYDROCARBONS;AIR SAMPLES;PRECONCENTRATION;SYSTEM;OZONE;HALOCARBONS;TUBES;LIGHT
日期:	1999
上传时间:	2010-06-29 19:46:57 (UTC+8)
出版者:	化學研究所
摘要:	An automated gas chromatographic system was constructed to easily adapt either the cryogenic trap or chemical sorbent trap for preconcentrating ambient levels of volatile organic compounds. Remarkable similarity in chromatograms from C-3 to C-10 was found between these two enrichment methods, except that the sorbent trap did not quantitatively trap the C-2-hydrocarbons, In contrast to cryogenic trapping, the chromatographic conditions for more volatile compounds were substantially improved using the sorbent trap. Water interference on the porous-layer open tubular column was also better managed using the sorbent trap for the continuous analysis of humid room air. The similarity in peak profiles between the GC-flame ionization detection (FID) and a commercial GC-MS system, regardless of concentration levels, facilitated compound identification on the FID chromatograms based on a field mission involving analysis of 106 air samples. (C) 1999 Elsevier Science BN. All rights reserved.
關聯:	JOURNAL OF CHROMATOGRAPHY A
显示于类别:	[化學研究所] 期刊論文

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