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Optimization and evaluation of multi-bed adsorbent tube method in collection of volatile organic compounds
Ho, Steven Sai Hang1,2,3; Wang, Liqin1,2; Chow, Judith C.2,3; Watson, John G.2,3; Xue, Yonggang1,2; Huang, Yu1,2; Qu, Linli4; Li, Bowei5,6; Dai, Wenting1,2,7; Li, Lijuan1,2,7; Cao, Junji1,2
2018-04-01
Source PublicationATMOSPHERIC RESEARCH
Volume202Issue:2018Pages:187-195
SubtypeArticle
AbstractThe 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 (O-3) precursors (C-2-C-12 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 O-3 concentrations. Analytes degraded during storage, while blank levels were elevated by passive adsorption. Adsorbent tube storage under cold temperatures (- 10 degrees C) in a preservation container filled with solid silica gel and anhydrous calcium sulfate (CaSO4) ensured sample integrity. A high efficiency (> 99%) O-3 scrubber (i.e., copper coil tube filled with saturated potassium iodide [KM removed O-3 (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 degrees C. Good linearity (R-2 > 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%.
KeywordVocs Method Optimization Thermal Desorption Adsorbent Tube Ozone Precursor
WOS HeadingsScience & Technology ; Physical Sciences
DOI10.1016/j.atmosres.2017.11.026
WOS KeywordPOLYFLUORINATED ALKYL SUBSTANCES ; PHOTOCHEMICAL OZONE FORMATION ; SOURCE APPORTIONMENT ; SAMPLING METHODS ; CHROMATOGRAPHY/MASS SPECTROMETRY ; AMBIENT AIR ; HONG-KONG ; TENAX-TA ; VOCS ; EMISSIONS
Indexed BySCI
Language英语
WOS Research AreaMeteorology & Atmospheric Sciences
WOS SubjectMeteorology & Atmospheric Sciences
WOS IDWOS:000426226500019
Citation statistics
Cited Times:5[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.ieecas.cn/handle/361006/5240
Collection粉尘与环境研究室
Affiliation1.Chinese Acad Sci, Inst Earth Environm, KLACP, Xian 710061, Shaanxi, Peoples R China
2.Chinese Acad Sci, Inst Earth Environm, SKLLQG, Xian 710061, Shaanxi, Peoples R China
3.Desert Res Inst, Div Atmospher Sci, Reno, NV 89512 USA
4.Hong Kong Premium Serv & Res Co, Kowloon, Hong Kong, Peoples R China
5.Xi An Jiao Tong Univ, Sch Human Settlements & Civil Engn, Dept Environm Sci & Technol, Xian 710049, Shaanxi, Peoples R China
6.Acad Ecol Industrializat Wisedom Environm, Langfang 065000, Peoples R China
7.Univ Chinese Acad Sci, Beijing, Peoples R China
Recommended Citation
GB/T 7714
Ho, Steven Sai Hang,Wang, Liqin,Chow, Judith C.,et al. Optimization and evaluation of multi-bed adsorbent tube method in collection of volatile organic compounds[J]. ATMOSPHERIC RESEARCH,2018,202(2018):187-195.
APA Ho, Steven Sai Hang.,Wang, Liqin.,Chow, Judith C..,Watson, John G..,Xue, Yonggang.,...&Cao, Junji.(2018).Optimization and evaluation of multi-bed adsorbent tube method in collection of volatile organic compounds.ATMOSPHERIC RESEARCH,202(2018),187-195.
MLA Ho, Steven Sai Hang,et al."Optimization and evaluation of multi-bed adsorbent tube method in collection of volatile organic compounds".ATMOSPHERIC RESEARCH 202.2018(2018):187-195.
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