title: [Primary research on indoor air concentration of particulate matter in residential house and its relationship with ambient pollution level].
abstract: OBJECTIVE
  To investigate the indoor air concentration of particulate matter in residential house and its relationship with ambient pollution level.
  
  
  METHODS
  Indoor and outdoor air level of PM2.5 and PM10 were monitored in 10 residential houses in downtown area.
  
  
  RESULTS
  In the non-heating period, the indoor air level of PM2.5 and PM10 were 27.0 - 272.9 microg/m3 and 42.9 - 309.6 microg/m3, respectively. In the heating period, PM2.5 and PM10 were 20.7 - 251.4 microg/m3 and 34.0 - 283.9 microg/m3, respectively. There were good correlation between the indoor air concentrations of PM2.5 and PM10. The relationships between the indoor and outdoor air concentrations of PM2.5 and PM10, however, were not clear.
  
  
  CONCLUSIONS
  Our results showed that there were serious indoor air pollution of particulate matter in residential house. Further research will be needed to clarify the characteristics of indoor air particulate matter pollution and its influence on resident.
authors.affiliation: Beijing Center for Disease Prevention and Control, Beijing 100013, China.
authors.forename: Yong
authors.initials: Y
authors.lastname: Zhang
authors.forename: Xin-Yi
authors.initials: XY
authors.lastname: Li
authors.forename: Li-Juan
authors.initials: LJ
authors.lastname: Jiang
authors.forename: Jian-Rong
authors.initials: JR
authors.lastname: Wei
authors.forename: Xin
authors.initials: X
authors.lastname: Sheng
authors.forename: Yumin
authors.initials: Y
authors.lastname: Liu
authors.forename: Xinbiao
authors.initials: X
authors.lastname: Guo
mesh_terms: D000393:Air Pollutants / Q000032:analysis*; D016902:Air Pollution, Indoor / Q000032:analysis*; D002681:China; D004781:Environmental Exposure / Q000032:analysis*; D004784:Environmental Monitoring; D006798:Housing; D010316:Particle Size; D052638:Particulate Matter / Q000032:analysis*
chemical_list: D000393:Air Pollutants; D052638:Particulate Matter