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2011223 
Journal Article 
Man-made vitreous fibres (MMVF) and fine dust in schools and kindergartens 
Walker, G; Ostendorp, G; Heinzow, B 
2012 
Yes 
Gefahrstoffe, Reinhaltung der Luft / Air Quality Control
ISSN: 0949-8036
EISSN: 1436-4891 
72 
3 
89-93 
WOS:000302568600004 
The concentrations of MMVF and fine particles (PM10, PM2.5) in indoor air in 20 schools and kindergartens in Schleswig-Holstein with installed MMVF-materials were measured. The fibre counting and assignment were carried out by scanning electron microscope/energy-dispersive X-ray analysis (SEM/EDXA). As expected in none of the analysed air samples fibres of asbestos were detected, but in some samples fibres of calcium sulfate and other inorganic fibres (MMVF) were found. All concentrations were below 500 fibres/m(3). Two different sampling methods for settled fibres were tested and showed similar results. The results of this study confirm that there is no need to remove MMVF-materials that are appropriately installed. Indoor air concentrations of fine particles (PM10 and PM2.(5)) were comparable with other studies. However the concentrations depend on the manner of re-suspending dust from surfaces, and under normal usage higher concentrations are possible than following standardized simulation of usage.