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Document ID (ISN)112184
CIS number 11-0844
ISSN - Serial title 1545-9624 - Journal of Occupational and Environmental Hygiene
Year 2009
Convention or series no.
Author(s) Salonen H.J., Lappalainen S.K., Riuttala H.M., Tossavainen A.P., Pasanen P.O., Reijula K.E.
Title Man-made vitreous fibers in office buildings in the Helsinki area
Bibliographic information Oct. 2009, Vol.6, No.10, p.624-631. Illus. 41 ref.
Internet access Man-made.pdf [in English]
Abstract In this study of 258 office buildings, the occurrence and density of settled man-made vitreous fibres (MMVFs) on surfaces were measured by two sampling methods. Altogether, 1113 samples of settled dust were collected from surfaces with plastic bags and gelatine tape and were analyzed with a scanning electron microscope and a stereomicroscope, respectively. Tape samples from 68 buildings were collected from 162 frequently-cleaned and 57 seldom-cleaned room surfaces in 56 and 29 offices, respectively, and from 24 supply air ducts in 10 offices. MMVFs longer than 20 μm were counted with a stereomicroscope. Irritation symptoms were recorded with a questionnaire. More than 60% of the surface dust and almost 90% of the samples collected from supply air ducts contained MMVFs. The density of MMVFs longer than 20 μm ranged from < 0.1 to 5 fibre/cm2. The mean density of the MMVFs was about two times higher on the seldom cleaned surfaces than on the frequently cleaned surfaces. The density was usually under 0.2 MMVF/cm2 in surface dust of offices without emission sources of MMVFs. The measurements combined with qualitative analysis of settled dust can help to localize relevant sources of fibre emissions. Altogether, in 40% of the buildings, several occupants had repeated irritation symptoms that were verified by occupational health care personnel.
Descriptors (primary) Finland; man-made fibres; offices; dust analysis; determination in air
Descriptors (secondary) symptoms; respiratory diseases; scanning electron microscopy; light microscopy; fibre counts; subjective assessment; questionnaire survey
Document type D - Periodical articles
Subject(s) Toxic and dangerous substances
Commerce, services, offices
Broad subject area(s) Chemical safety
Browse category(ies) Office work
Air pollution
Sick building syndrome