Zhonghua yu fang yi xue za zhi [Chinese journal of preventive medicine]
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Zhonghua Yu Fang Yi Xue Za Zhi · Sep 2013
[Concentration level and characteristics of indoor particle matter ≤ 2.5 µm in aerodynamic diameter under extreme weather condition in Beijing winter in 2013].
To study the concentration level and characteristics of indoor particle matter ≤ 2.5 µm in aerodynamic diameter (PM2.5) under extreme weather condition. ⋯ Mass concentration of indoor PM2.5 increased significantly with increases of outdoor concentration. Haze and setting off fireworks/firecracker could lead to a serious decline of indoor air quality (IAQ), and the improvement of IAQ was lagging behind the outdoor changes.