title: [Study on the acquiring data time and intervals for measuring performance of air cleaner on formaldehyde].
abstract: OBJECTIVE
  The measuring time and measuring intervals to evaluate different type of air cleaner performance to remove formaldehyde were provided.
  
  
  METHODS
  The natural decay measurement and formaldehyde removal measurement were conducted in 1.5 m3 and 30 m3 test chamber.
  
  
  RESULTS
  The natural decay rate was determined by acquiring formaldehyde concentration data at 15 minute intervals for 2.5 hours. The measured decay rate was determined by acquiring formaldehyde concentration data at 5 minute intervals for 1.2 hours. When the wind power of air cleaner is smaller than 30 m3/h or measuring performance of no wind power air clearing product, the 1.5 m3 test chamber can be used. Both the natural decay rate and the measured decay rate are determined by acquiring formaldehyde concentration data at 8 minute intervals for 64 minutes.
  
  
  CONCLUSIONS
  There were different measuring time and measuring intervals to evaluate different type of air cleaner performance to remove formaldehyde.
authors.affiliation: Institute of Environmental Health and Related Products Safety, Centers for Disease Prevention and Control, Beijing 100021, China.
authors.forename: Zhigang
authors.initials: Z
authors.lastname: Tang
authors.forename: Guifang
authors.initials: G
authors.lastname: Wang
authors.forename: Dongqun
authors.initials: D
authors.lastname: Xu
authors.forename: Keqin
authors.initials: K
authors.lastname: Han
authors.forename: Yunpu
authors.initials: Y
authors.lastname: Li
authors.forename: Aijun
authors.initials: A
authors.lastname: Zhang
authors.forename: Xiaoyan
authors.initials: X
authors.lastname: Dong
mesh_terms: D000393:Air Pollutants / Q000032:analysis / Q000302:isolation & purification*; D000397:Air Pollution / Q000517:prevention & control*; D005374:Filtration / Q000295:instrumentation*; D005557:Formaldehyde / Q000032:analysis / Q000302:isolation & purification*; D013997:Time Factors
chemical_list: D000393:Air Pollutants; D005557:Formaldehyde