. Results from the ATHLETIC study: Measurements of indoor volatile organic compounds using a new proton transfer reaction mass spectrometer

Abstract
Humans spend about 90% of their time indoors, yet most air quality research focuses on the outdoor environment. Gas and particle measurements were made in the weight room of the Dal Ward Athletic Center from November 1 - 19 as part of the ATHLETIC field study. Measurements inside the weight room and supply air duct system were alternated to determine enhancements caused by sources within the weight room. A new proton transfer reaction mass spectrometer (VOCUS) was deployed as part of this campaign to measure volatile organic compounds (VOCs). The VOCUS affords improved mass resolution and sensitivity compared to previous continuous high time resolution proton transfer reaction mass spectrometers. Distinct VOC profiles were observed in the Dal Ward Athletic Center that come from (1) human breath (2) evaporation from personal care products (3) cleaning and (4) off-gassing from the building. Some preliminary results will be presented during the Rendezvous as well as a summary of the capabilities of the VOCUS for trace gas measurements in general.