Concentrations of microbial volatile organic compounds (MVOCs) in the living rooms and bedrooms of sixty houses across East Japan were determined in February 2015. A questionnaire survey on indoor dampness was also conducted. Acetaldehyde, isobutyl acetate, 2-methyl-1-propanol, 2-methyl-1-butanol, 3-methyl-1-butanol, 2-penthylfuran, 1-pentanol, and 2-ethyl-1-hexanol were detected in 100%, 79%, 90%, 94%, 86%, 84%, 85%, and 98% of rooms, respectively. Concentrations in living rooms were significantly correlated with concentrations in bedrooms. Dimethyl disulfide, 2-pentanol, 2-methyl-1-butanol, 3-methyl-1-butanol, 1-pentanol, formaldehyde, acetaldehyde, and propionaldehyde registered higher concentrations in living rooms than in bedrooms. A comparison of the dampness index and individual MVOC concentrations indicates that MVOC concentrations appear to increase with increases in the dampness index, although no significant relationship was found. Concentrations of isobutyl acetate, 2-methyl-1-butanol, and 3-methyl-1-butanol in indoor environments where fungi were visible on walls were significantly higher than indoor environments where fungi were not visible. In addition, 2-hexanone concentrations in bedrooms where residents detected fungal odor were higher than concentrations in bedrooms where fungal odor was not detected. Indoor MVOC concentrations were not associated with the frequency of ventilation and combustion heater, which were collected data through questionnaire to residents.
Building and Environment – Elsevier
Published: Mar 15, 2018
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