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An experimental set-up has been implemented where indoor materials are used as a membrane separating two air compartments. Both compartments are constantly flushed with air, one air stream containing a mixture of 20 volatile organic compounds (VOCs), and concentrations in both compartments are measured after 1 hour. 12 materials usually covering extensive surfaces indoors were consecutively exposed to the vapour mixture at concentration levels typically found in indoor environments. 7 of these materials exhibited a permeability high enough that VOCs could be discovered on the other side, among them a gypsum board. Diffusion of VOCs into and through indoor materials has therefore been confirmed experimentally.

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Authors: MEININGHAUS R, JRC Ispra (IT);KNÖPPEL H, JRC Ispra (IT);SALTHAMMER T, Fraunhofer Institute for Wood Research, Braunschweig (DE)
Bibliographic Reference: Article: Atmospheric Environment A (1998)
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