DOI: 10.1016/j.atmosres.2017.11.026
Scopus记录号: 2-s2.0-85036612219
论文题名: Optimization and evaluation of multi-bed adsorbent tube method in collection of volatile organic compounds
作者: Ho S.S.H. ; Wang L. ; Chow J.C. ; Watson J.G. ; Xue Y. ; Huang Y. ; Qu L. ; Li B. ; Dai W. ; Li L. ; Cao J.
刊名: Atmospheric Research
ISSN: 1698095
出版年: 2018
卷: 202 起始页码: 187
结束页码: 195
语种: 英语
英文关键词: Adsorbent tube
; Method optimization
; Ozone precursor
; Thermal desorption
; VOCs
Scopus关键词: Calcium compounds
; Desorption
; Environmental Protection Agency
; Gas chromatography
; Organic compounds
; Ozone
; Scrubbers
; Silica
; Silica gel
; Sulfur compounds
; Thermal desorption
; Volatile organic compounds
; Adsorbent tubes
; Cold temperatures
; Method detection limits
; Ozone precursors
; Photochemical assessment monitoring stations
; Relative standard deviations
; Thermal desorption gas chromatography/mass spectrometries
; U.S. Environmental Protection Agency
; Tubes (components)
; adsorption
; atmospheric chemistry
; concentration (composition)
; desorption
; gas chromatography
; mass spectrometry
; optimization
; ozone
; volatile organic compound
; water vapor
英文摘要: The feasibility of using adsorbent tubes to collect volatile organic compounds (VOCs) has been demonstrated since the 1990's and standardized as Compendium Method TO-17 by the U.S. Environmental Protection Agency (U.S EPA). This paper investigates sampling and analytical variables on concentrations of 57 ozone (O3) precursors (C2-C12 aliphatic and aromatic VOCs) specified for the Photochemical Assessment Monitoring Station (PAMS). Laboratory and field tests examined multi-bed adsorbent tubes containing a sorbate combination of Tenax TA, Carbograph 1 TD, and Carboxen 1003. Analyte stabilities were influenced by both collection tube temperature and ambient O3 concentrations. Analytes degraded during storage, while blank levels were elevated by passive adsorption. Adsorbent tube storage under cold temperatures (− 10 °C) in a preservation container filled with solid silica gel and anhydrous calcium sulfate (CaSO4) ensured sample integrity. A high efficiency (> 99%) O3 scrubber (i.e., copper coil tube filled with saturated potassium iodide [KI]) removed O3 (i.e., < 200 ppbv) from the air stream with a sampling capacity of 30 h. Water vapor scrubbers interfered with VOC measurements. The optimal thermal desorption-gas chromatography/mass spectrometry (TD-GC/MS) desorption time of 8 min was found at 330 °C. Good linearity (R2 > 0.995) was achieved for individual analyte calibrations (with the exception of acetylene) for mixing ratios of 0.08–1.96 ppbv. The method detection limits (MDLs) were below 0.055 ppbv for a 3 L sample volume. Replicate analyses showed relative standard deviations (RSDs) of < 10%, with the majority of the analytes within < 5%. © 2017 Elsevier B.V. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/108968
Appears in Collections: 影响、适应和脆弱性 气候变化事实与影响
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作者单位: Key Laboratory of Aerosol Chemistry & Physics (KLACP), Institute of Earth Environment, Chinese Academy of Sciences, Xi'an, 710061, China; State Key Laboratory of Loess and Quaternary Geology (SKLLQG), Institute of Earth Environment, Chinese Academy of Sciences, Xi'an, 710061, China; Division of Atmospheric Sciences, Desert Research Institute, Reno, NV 89512, United States; Hong Kong Premium Services and Research Company, Lai Chi Kok, Kowloon, Hong Kong; Department of Environmental Science and Technology, School of Human Settlements and Civil Engineering, Xi'an Jiaotong University, Xi'an, 710049, China; Academy of Ecology Industrialization for Wisedom Environment, Langfang, 065000, China; University of Chinese Academy of Sciences, Beijing, China
Recommended Citation:
Ho S.S.H.,Wang L.,Chow J.C.,et al. Optimization and evaluation of multi-bed adsorbent tube method in collection of volatile organic compounds[J]. Atmospheric Research,2018-01-01,202