Abstract
Particulate matter (PM) can be harmful for works of art by causing soiling and chemical damage, depending on particle size and chemical composition. The aim of this study was to investigate concentrations and sources of airborne PM in the indoor environment of the National Museum in the centre of Prague and in a small town Terezín, and to establish the relationship between the indoor and outdoor environment.
The measurements have been done during two intensive campaigns and included particle number concentrations and size distributions. Time variation of fine particles concentration in Prague indicated outdoor origin with traffic as the most probable source.
The concentration of coarse particles revealed periodic increase and decrease, corresponding to beginning and end of visiting hours, indicating visitors as a source of these particles.