« Previous AbstractHuman transport of thirdhand tobacco smoke: A prominent source of hazardous air pollutants into indoor nonsmoking environments    Next Abstract"In vitro characterization of ligand-induced oligomerization of the S. cerevisiae G-protein coupled receptor, Ste2p" »

Environ Sci Technol

Title:		"Evaluating Indoor Air Chemical Diversity, Indoor-to-Outdoor Emissions, and Surface Reservoirs Using High-Resolution Mass Spectrometry"
Author(s):		Sheu R; Fortenberry CF; Walker MJ; Eftekhari A; Stonner C; Bakker A; Peccia J; Williams J; Morrison GC; Williams BJ; Gentner DR;
Address:		"Department of Chemical and Environmental Engineering, Yale University, New Haven, Connecticut 06511, United States. Department of Energy, Environmental, & Chemical Engineering and Center for Aerosol Science and Engineering, Washington University in St. Louis, St. Louis, Missouri 63130, United States. Department of Environmental Sciences and Engineering, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27515, United States. Department of Atmospheric Chemistry, Max Planck Institute for Chemistry, Mainz 55128, Germany"
Journal Title:		Environ Sci Technol
Year:		2021
Volume:		20210716
Issue:		15
Page Number:		10255 - 10267
DOI:		10.1021/acs.est.1c01337
ISSN/ISBN:		1520-5851 (Electronic) 0013-936X (Print) 0013-936X (Linking)
Abstract:		"Detailed offline speciation of gas- and particle-phase organic compounds was conducted using gas/liquid chromatography with traditional and high-resolution mass spectrometers in a hybrid targeted/nontargeted analysis. Observations were focused on an unoccupied home and were compared to two other indoor sites. Observed gas-phase organic compounds span the volatile to semivolatile range, while functionalized organic aerosols extend from intermediate volatility to ultra-low volatility, including a mix of oxygen, nitrogen, and sulfur-containing species. Total gas-phase abundances of hydrocarbon and oxygenated gas-phase complex mixtures were elevated indoors and strongly correlated in the unoccupied home. While gas-phase concentrations of individual compounds generally decreased slightly with greater ventilation, their elevated ratios relative to controlled emissions of tracer species suggest that the dilution of gas-phase concentrations increases off-gassing from surfaces and other indoor reservoirs, with volatility-dependent responses to dynamically changing environmental factors. Indoor-outdoor emissions of gas-phase intermediate-volatility/semivolatile organic hydrocarbons from the unoccupied home averaged 6-11 mg h(-1), doubling with ventilation. While the largest single-compound emissions observed were furfural (61-275 mg h(-1)) and acetic acid, observations spanned a wide range of individual volatile chemical products (e.g., terpenoids, glycol ethers, phthalates, other oxygenates), highlighting the abundance of long-lived reservoirs resulting from prior indoor use or materials, and their gradual transport outdoors"
Keywords:		"Aerosols/analysis *Air Pollutants/analysis *Air Pollution, Indoor/analysis Environmental Monitoring Gas Chromatography-Mass Spectrometry Mass Spectrometry *Volatile Organic Compounds/analysis aerosols atmospheric chemistry emissions of volatile chemical p;"
Notes:		"MedlineSheu, Roger Fortenberry, Claire F Walker, Michael J Eftekhari, Azin Stonner, Christof Bakker, Alexa Peccia, Jordan Williams, Jonathan Morrison, Glenn C Williams, Brent J Gentner, Drew R eng R835751/EPA/EPA/ Research Support, Non-U.S. Gov't Research Support, U.S. Gov't, Non-P.H.S. 2021/07/17 Environ Sci Technol. 2021 Aug 3; 55(15):10255-10267. doi: 10.1021/acs.est.1c01337. Epub 2021 Jul 16"