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DOI	10.1016/j.atmosenv.2021.118705
	Vapor- and aerosol-phase atmospheric organic matter in urban air of the Midwest USA
	Flores R.M.; Doskey P.V.
发表日期	2021
ISSN	1352-2310
卷号	264
英文摘要	Vapor- and aerosol-phase atmospheric organic matter were collected in East St. Louis, MO using the high-volume sampling method. Samples were processed by traditional analytical methods and analyzed by multidimensional gas chromatography with time-of-flight mass spectrometric detection. Levels of identified, hydrocarbon-like organic vapor and aerosol species (i.e., HOV and HOA, respectively) were 10–42 ng m−3 and 0.020–3.6 ng m−3, respectively. Concentrations of identified, oxygenated organic vapor and aerosol species (i.e., OOV and OOA, respectively) were 2–66 ng m−3 and 23–310 ng m−3, respectively. The principal feature of the HOV was an unresolved complex mixture that represented 54.5 ± 11.3% of the total HOVs during the field campaign. Levels of n- and branched alkanes, alkyl and cycloalkylbenzenes, polyaromatic hydrocarbons (PAHs), and alkyl-substituted PAHs generally declined from the morning rush hour to the 1000–1400 sampling period, which was similar to the expected trend in reactivity with respect to OH. The OOV included aliphatic mono-carboxylic acids, aliphatic and aromatic alcohols, aldehydes, and ketones, and alicyclic ketones, alcohols, and epoxides (i.e., montoterpenoids). The bulk of the OA species (∼99%) were a complex mixture of OOA, which included multifunctional n-aliphatic, alicyclic, and aromatic hydrocarbons, dicarboxylic and ketocarboxylic aliphatic and dicarboxylic monoaromatic acids, lactones, tetrols, and pentitols. The sampling and analytic techniques provided quantitative molecular information for HOVs in ambient air, which are a missing source of secondary organic aerosol precursors. Molecular characterization and quantitation of HOVs and OOA species will facilitate predictions of SOA formation using molecular-specific models. © 2021 Elsevier Ltd
关键词	Multidimensional gas chromatography Organic vapor Secondary organic aerosol (SOA)Urban air composition
语种	英语
scopus关键词	Aerosols; Gas chromatography; Mass spectrometry; Mineral oils; Mixtures; Polycyclic aromatic hydrocarbons; Aerosol phase; Multi dimensional gas chromatography (MDGC); Organic aerosol; Organic vapors; Secondary organic aerosol; Urban air; Urban air composition; Vapor Phase; Vapor phasis; Vapour-phase; Ketones; alcohol derivative; aldehyde; alkane derivative; alkyl group; aromatic hydrocarbon; benzene derivative; epoxide; ketone; ketone derivative; lactone; monoterpenoid; organic matter; aerosol; aerosol composition; gas chromatography; organic matter; sampling; urban atmosphere; water vapor; aerosol; air quality; ambient air; analytic method; Article; gas chromatography; mass fragmentography; meteorology; quantitative analysis; spectroscopy; United States; urban area; vapor; East Saint Louis; Illinois; United States
来源期刊	ATMOSPHERIC ENVIRONMENT
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/248235
作者单位	Department of Civil and Environmental Engineering, Michigan Technological University, 1400 Townsend Drive, Houghton, MI 49931-1295, United States; School of Forest Resources and Environmental Science, Michigan Technological University, 1400 Townsend Drive, Houghton, MI 49931-1295, United States; Atmospheric Sciences Program, Michigan Technological University, 1400 Townsend Drive, Houghton, MI 49931-1295, United States
推荐引用方式 GB/T 7714	Flores R.M.,Doskey P.V.. Vapor- and aerosol-phase atmospheric organic matter in urban air of the Midwest USA[J],2021,264.
APA	Flores R.M.,&Doskey P.V..(2021).Vapor- and aerosol-phase atmospheric organic matter in urban air of the Midwest USA.ATMOSPHERIC ENVIRONMENT,264.
MLA	Flores R.M.,et al."Vapor- and aerosol-phase atmospheric organic matter in urban air of the Midwest USA".ATMOSPHERIC ENVIRONMENT 264(2021).