In-line sampling with gas chromatography-mass spectrometry to monitor ambient volatile organic compounds

NCU Institutional Repository > 理學院 > 化學學系 > 期刊論文 > Item 987654321/100303

jsp.display-item.identifier=請使用永久網址來引用或連結此文件: https://ir.lib.ncu.edu.tw/handle/987654321/100303

题名:	In-line sampling with gas chromatography-mass spectrometry to monitor ambient volatile organic compounds
作者:	王家麟;Wang, Jia-Lin;Chang, Chih-Chung;Lee, Kun-Zhang
贡献者:	理學院化學學系
关键词:	Air Pollutants - analysis;detection limit;Environmental Monitoring - instrumentation;Equipment Design;esters;ethers;field experimentation;gas chromatography-mass spectrometry;Gas Chromatography-Mass Spectrometry - instrumentation;Gas chromatography–mass spectrometry/flame ionization detector (GC–MS/FID);ketones;monitoring;nitrogen;Non-methane hydrocarbons (NMHCs);On-site;Ozone precursors;quality control;Sensitivity and Specificity;volatile organic compounds;Volatile organic compounds (VOCs);Volatile Organic Compounds - analysis
日期:	2012-07-27
上传时间:	2026-04-21 13:56:53 (UTC+8)
出版者:	Elsevier;Netherlands: Elsevier B.V
摘要:	摘要： ► An in-line sampling manifold was devised and incorporated within a GC–MS. ► Prolongation of sampling time and sample enrichment with minimal LN2 consumption were achieved. ► High-quality continuous field measurements of 106 VOCs. ► The easily built in-line sampling apparatus can be connected with any GC or GC–MS. An existing GC–MS/FID method coupling with the cryogenic trapping was improved to perform continuous field monitoring of 106 VOCs, covering a wide range of volatilities and polarities (C2–C11 NMHCs, ≥C1 halocarbons, toxic chlorinated compounds, ethers, some esters and ketones). Cryogenic enrichment was employed from the standpoints of higher signal-to-noise ratio, less carry-over and better protection of thermally labile compounds than chemical sorbent enrichment. However, cryogen consumption is large and creates a great logistical burden for field deployment. As a result, a new in-line sampling manifold was designed and incorporated into the system to separate the sampling from trapping during enrichment of ambient VOCs, which gave rise to two major advantages: (1) the sampling is performed by a pre-evacuated flask, which does not need cryogen when filling a sample, so that the sampling time can be extended to yield better sample representation (approximately one hour was chosen for the sampling time for hourly data resolution in this study) and (2) because the cryo-trapping only takes a short time period (3min in this study), the consumption of cryogen is greatly reduced (4L liquid nitrogen per sample for conventional cryo-trapping vs. 0.6L for the new method). The robustness of the automated GC–MS/FID coupling with in-line sampling for the 106 target compounds was assessed with a set of quality assurance criteria of system blank, wall effect, precision, linearity, detection limit and field test to support the field applicability of the method. The configuration of the proposed in-line sampling apparatus is simple and rugged, which can be easily built and connected with any GC or GC–MS and readily deployed in the field to perform high-quality continuous measurements of more than 106 VOCs. 其他題名： J Chromatogr A 出版者： Netherlands: Elsevier B.V 出版日期： 2012-07-27 出處： Journal of Chromatography A, 2012-07, Vol.1248, p.161-168 版權： 2012 Elsevier B.V. 版權： Copyright © 2012 Elsevier B.V. All rights reserved. 識別號： ISSN: 0021-9673 識別號： ISSN: 1873-3778 識別號： EISSN: 1873-3778 識別號： DOI: 10.1016/j.chroma.2012.05.091 識別號： PMID: 22717034
显示于类别:	[化學學系] 期刊論文

文件中的档案:

档案	描述	大小	格式	浏览次数
index.html		0Kb	HTML	18	检视/开启

在NCUIR中所有的数据项都受到原著作权保护.

社群 sharing

数据加载中.....