Abstract
Particulate matter profiles of PM10, PM2.5, and PM1 were investigated simultaneously in the indoor and outdoor air of 8 homes near a major road in the Taipei urban area in winter. The concentration of PM10 was measured consecutively from 7:30 to 10:30 during rush hour and non-rush hour. The major apparatuses were two portable laser particles measurements (DM1 100). The results show that the average indoor and outdoor PM 10 concentrations were found to be 32.17±13.63 and 47.49±18.43 μg m^(-3) during rush hour, as well as 9.38±4.66 and 14.78±6.68μg m^(-3) during non-rush hour, respectively. The average value of Indoor/outdoor (I/O) ratios of PM10 was observed to be 0.67 during rush hour, as well as 0.64 during non-rush hour, respectively. There were no significant concentration different observed in I/O levels during rush hour and non-rush hour. Regarding particulate matter profiles, it was found that mass concentrations of indoor in PM2.5/PM10, PM1/PM10, and PM1/PM2.5 were 0.63, 0.01 and 0.15 during rush hour, as well as 0.67, 0.14, and 0.21 during non-rush hour, respectively. This finding has a significant implication for management of indoor air quality in the building located near a busy road.
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