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Chemosphere

Title:		Intermediate volatile organic compounds in Canadian residential air in winter: Implication to indoor air quality
Author(s):		Feng YL; Yang C; Cao XL;
Address:		"Exposure and Biomonitoring Division, Environmental Health Science and Research Bureau, Health Canada, 251 Sir Frederick Banting Driveway, Ottawa, Ontario, K1A 0K9, Canada. Electronic address: yong-lai.feng@hc-sc.gc.ca. Emergencies Science and Technology Section, Science and Technology Branch, Environment and Climate Change Canada, Ottawa, Ontario, Canada. Electronic address: chun.yang@ec.gc.ca. Food Research Division, Bureau of Chemical Safety, Food Directorate, Health Canada, 251 Frederick Banting Driveway, AL: 2203D, Ottawa, Ontario, K1A 0K9, Canada"
Journal Title:		Chemosphere
Year:		2023
Volume:		20230404
Issue:
Page Number:		138567 -
DOI:		10.1016/j.chemosphere.2023.138567
ISSN/ISBN:		1879-1298 (Electronic) 0045-6535 (Linking)
Abstract:		"Intermediate volatile organic compounds (IVOCs) have recently been characterized for their contributions to the formation of secondary organic aerosol in atmospheric air. However, IVOCs in air in various indoor environments have not been characterized yet. In this study, we characterized and measured IVOCs, volatile organic compounds (VOCs) and semi-volatile organic compounds (SVOCs), in residential indoor air in Ottawa, Canada. IVOCs, including n-alkanes, branched-chain alkanes (b-alkanes), unspecified complex mixtures (UCM) IVOCs, and oxygenated IVOCs (such as fatty acids), were found to have a large impact on indoor air quality. The results indicate that the indoor IVOCs behave differently from those in the outdoor environment. IVOCs in the studied residential air ranged from 14.4 to 69.0 mug/m(3), with a geometric mean of 31.3 mug/m(3), accounting for approximately 20% of the total organic compounds (IVOCs, VOCs and SVOCs) in indoor air. The total b-alkanes and UCM-IVOCs were found to have statistically significant positive correlations with indoor temperature but have no correlations with airborne particulate matter less than 2.5 mum (PM(2.5)) as well as ozone (O(3)) concentration. However, indoor oxygenated IVOCs behaved differently from b-alkanes and UCM-IVOCs, with a statistically significant positive correlation with indoor relative humidity but no correlation with other indoor environmental conditions"
Keywords:		"*Volatile Organic Compounds/analysis *Air Pollution, Indoor/analysis *Air Pollutants/analysis Canada Alkanes Environmental Monitoring/methods Indoor air quality Indoor environmental conditions Intermediate volatile organic compounds (IVOCs) Residential ai;"
Notes:		"MedlineFeng, Yong-Lai Yang, Chun Cao, Xu-Liang eng England 2023/04/07 Chemosphere. 2023 Jul; 328:138567. doi: 10.1016/j.chemosphere.2023.138567. Epub 2023 Apr 4"