| Title: | Contribution of human-related sources to indoor volatile organic compounds in a university classroom |
| Author(s): | Liu S; Li R; Wild RJ; Warneke C; de Gouw JA; Brown SS; Miller SL; Luongo JC; Jimenez JL; Ziemann PJ; |
| Address: | "Cooperative Institute for Research in Environmental Sciences, University of Colorado, Boulder, CO, USA. Department of Chemistry and Biochemistry, University of Colorado, Boulder, CO, USA. Department of Atmospheric and Oceanic Sciences, University of Colorado, Boulder, CO, USA. Chemical Sciences Division, NOAA Earth System Research Laboratory, Boulder, CO, USA. Department of Mechanical Engineering, University of Colorado, Boulder, CO, USA" |
| ISSN/ISBN: | 1600-0668 (Electronic) 0905-6947 (Linking) |
| Abstract: | "Although significant progress has been made in understanding the sources and chemistry of indoor volatile organic compounds (VOCs) during the past decades, much is unknown about the role of humans in indoor air chemistry. In the spring of 2014, we conducted continuous measurements of VOCs using a proton transfer reaction mass spectrometer (PTR-MS) in a university classroom. Positive matrix factorization (PMF) of the measured VOCs revealed a 'human influence' component, which likely represented VOCs produced from human breath and ozonolysis of human skin lipids. The concentration of the human influence component increased with the number of occupants and decreased with ventilation rate in a similar way to CO(2) , with an average contribution of 40% to the measured daytime VOC concentration. In addition, the human skin lipid ozonolysis products were observed to correlate with CO(2) and anticorrelate with O(3) , suggesting that reactions on human surfaces may be important sources of indoor VOCs and sinks for indoor O(3) . Our study suggests that humans can substantially affect VOC composition and oxidative capacity in indoor environments" |
| Keywords: | "Air Pollution, Indoor/*analysis Environmental Monitoring/*methods Humans *Universities Volatile Organic Compounds/*analysis Human occupants Indoor air quality Positive matrix factorization Proton transfer reaction mass spectrometer Skin lipid ozonolysis V;" |
| Notes: | "MedlineLiu, S Li, R Wild, R J Warneke, C de Gouw, J A Brown, S S Miller, S L Luongo, J C Jimenez, J L Ziemann, P J eng Research Support, Non-U.S. Gov't England 2015/11/27 Indoor Air. 2016 Dec; 26(6):925-938. doi: 10.1111/ina.12272. Epub 2015 Dec 23" |
