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Research team at KTL

  • Matti Jantunen, prof.
  • Kimmo Koistinen, PhD.
  • Otto Hänninen, MSc.


  • University of Athens, Greece
  • Universität Basel, Switzerland
  • Finnish Meteorological Institute, Finland
  • Institute of Genetic Ecotoxicology, Czech Rebublic
  • Université Joseph Fourier in Grenoble, France
  • University of Kuopio, Finland
  • University of Milan, Italy
  • Helsinki Metropolitan Area Council, Finland.


  • Academy of Findland, SYTTY program (EAS-EXPOLIS)
  • TEKES (RELEX) (for the Finnish part)

Contact person

  • Matti Jantunen


The particulate matter collected on filter samples contain a huge variety of chemical compounds. The health effects of particulate matter is possibly connected to the elemental or chemical composition of the particles. This is one of the reasons why the composition of the samples is of interest. Second reason is that the elemental composition of particulates can be used to separate the fractions of particulate matter originating from different sources. This is called source apportionment, and from the point of view of air quality management it is very important.

In the EAS project, the population-based filters of personal PM2.5 exposure as well as home indoor and home outdoor PM2.5 concentrations collected in the EXPOLIS Study in 1996-1997 have been analyzed for elemental composition using Energy Dispersive X-ray Fluorescence spectrometry (ED-XRF) in the University of Basel. Knowledge of the chemical content has permitted investigation of specific patterns of indoor and outdoor particulates in relation to indoor and outdoor sources of PM2.5. The distributions of source specific PM2.5 exposure among populations have been modelled .


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