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DOI	10.1016/j.atmosenv.2020.117839
	Characterization of organic compounds and oxidative potential of aqueous PM2.5 suspensions collected via an aerosol-into-liquid collector for use in toxicology studies
	Soleimanian E.; Taghvaee S.; Sioutas C.
发表日期	2020
ISSN	13522310
卷号	241
英文摘要	In this study, we investigated the organic constituents and toxicological characteristics of PM2.5 liquid suspensions collected by the means of a modified versatile aerosol concentration enrichment system (VACES)/aerosol-into-liquid collector tandem technology. Filter and slurry PM2.5 samples were collected during warm (spanning from mid-August 2019 to early-September 2019) and cold (from mid-December 2019 to early-January 2020) seasons at an urban site in central Los Angeles. The collected samples were chemically analyzed for their total organic carbon (TOC) as well as individual organic species, including polycyclic aromatic hydrocarbons (PAHs), hopanes and steranes, n-alkanes, and organic acids. In addition, the oxidative potential of PM2.5 samples was quantified by means of the 2′,7′-dichlorodihydrofluorescein (DCFH) in vitro assay. Overall, our findings revealed a very good agreement between the mass fractions of organic compounds in the collected PM2.5 slurries and filters, judging by the average slurry-to -filter ratios of 1.17 ± 0.15, 1.13 ± 0.14, 1.13 ± 0.15, and 1.16 ± 0.22 for PAHs, hopanes and steranes, n-alkanes, and organic acids, respectively. Moreover, comparable (Pvalue = 0.2) oxidative potential levels were observed between the collected filters and PM2.5 liquid suspensions. The aqueous PM suspensions collected by the VACES/aerosol-into-liquid collector exhibited slightly higher (although not statistically significant) capture of some semi-volatile organic compounds (SVOCs), probably due to less sampling artifacts and better preservation of these SVOCs collected directly into aqueous suspensions compared to the filter samplers. The outcomes of this study confirm the efficient collection of PM-bound organic species in aqueous slurries by the aerosol-into-liquid collector, further corroborating the ability of this sampler to be used as an attractive alternative to filter samplers for collection of PM2.5 for toxicological studies. © 2020 Elsevier Ltd
英文关键词	Aerosol-into-liquid collector; Organic compounds; Oxidative potential; PM2.5 slurry collection; Sampling artifacts; Versatile aerosol concentration enrichment system (VACES)
语种	英语
scopus关键词	Aerosols; Liquids; Organic acids; Organic carbon; Paraffins; Polycyclic aromatic hydrocarbons; Urban growth; Volatile organic compounds; Aqueous suspensions; Organic constituents; Oxidative potential; Polycyclic aromatic hydrocarbons (PAHS); Sampling artifacts; Semi-volatile organic compounds (SVOCs); Total Organic Carbon; Versatile aerosol concentration enrichment systems; Suspensions (fluids); alkane derivative; carboxylic acid derivative; dichlorodihydrofluorescein; organic compound; polycyclic aromatic hydrocarbon derivative; volatile organic compound; aqueous solution; concentration (composition); organic acid; organic compound; PAH; particulate matter; total organic carbon; toxicology; urban area; volatile organic compound; aerosol; Article; artifact; California; concentration (parameter); controlled study; in vitro study; liquid; oxidation reduction potential; priority journal; quantitative analysis; sampling; suspended particulate matter; total organic carbon; toxicology; urban area; Los Angeles [California]
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/144968
作者单位	University of Southern California, Department of Civil and Environmental Engineering, Los Angeles, CA, United States
推荐引用方式 GB/T 7714	Soleimanian E.,Taghvaee S.,Sioutas C.. Characterization of organic compounds and oxidative potential of aqueous PM2.5 suspensions collected via an aerosol-into-liquid collector for use in toxicology studies[J],2020,241.
APA	Soleimanian E.,Taghvaee S.,&Sioutas C..(2020).Characterization of organic compounds and oxidative potential of aqueous PM2.5 suspensions collected via an aerosol-into-liquid collector for use in toxicology studies.Atmospheric Environment,241.
MLA	Soleimanian E.,et al."Characterization of organic compounds and oxidative potential of aqueous PM2.5 suspensions collected via an aerosol-into-liquid collector for use in toxicology studies".Atmospheric Environment 241(2020).