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NRC Publications Archive Archives des publications du CNRCThis publication could be one of several versions: author's original, accepted manuscript or the publisher's version. / La version de cette publication peut être l'une des suivantes : la version prépublication de l'auteur, la version acceptée du manuscrit ou la version de l'éditeur. For the publisher's version, please access the DOI link below./ Pour consulter la version de l'éditeur, utilisez le lien DOI ci-dessous.http://dx.doi.org/10.1016/S1352-2310(00) Atmospheric Environment, 35, 7, pp. 1291Environment, 35, 7, pp. -1299Environment, 35, 7, pp. , 2001 A version of this paper is published in / Une version de ce document se trouve dans :Atmospheric Environment, v. 35, no. 7, 2001Environment, v. 35, no. 7, , pp. 1291Environment, v. 35, no. 7, -1299 www.nrc.ca/irc/ircpubs Abstract -The sorption of VOCs by different building materials can significantly affect VOC concentrations in indoor environments. In this paper, a new model has been developed for simulating VOC sorption and desorption rates of homogeneous building materials with constant diffusion coefficients and material-air partition coefficients.The model analytically solves the VOC sorption rate at the material-air interface. It can be used as a "wall function"in combination with more complex gas-phase models that account for non-uniform mixing to predict sorption process. It can also be used in conjunction with broader indoor air quality studies to simulate VOC exposure in buildings.Key word index: Numerical model, indoor air quality, diffusion coefficient, partition coefficient, environmental chamber, gypsum board. T 0 reference temperature [K]