ID = 13 
Title = Documentation of Field and Laboratory Emission Cell "FLEC" - Identification of Emission Processes from Carpet, Linoleum, Paint and Sealant by Modelling 
Abstract = The concentrations of selected volatile organic compounds (VOC) were measured from four preconditioned materials in the Field and Laboratory and Emission Cell (FLEC). The materials were a carpet, a linoleum, a waterborne paint, and a sealant. Measurements were carried out at three different air exchange rates, 171, 342, 684 h-1, respectively, and measured during a period of six days. Modelling of the concentration vs. time data for two air exchange rates showed that the emission of VOC from the carpet were best described with a diffusion model for all data while a reduced data set eliminating initial events also could be described with a first order decay incorporating a sink effect. The decay of the polar semi-VOC, Texanol, could be described with a first order decay model incorporating a sink effect for all three air exchange rates. However, the rate constant doubled by doubling the air exchange rate. The decay data for VOC from the sealant were best described for all three air exchange rates with a diffusion model incorporating a concentration gradient dependent diffusion and a reduced data set. Best fit was obtained for the unpolar hexane, but satisfactory results were also obtained for 2-ethylhexanol and dimethyloctanol. The decay results of linoleum did not allow for modelling leading to the conclusion that an internal concentration gradient had not yet been established under the experimental conditions. 
Location = Indoor Air`93 vol 2: 549-554 
Reference type = Proceeding (Conference) 
Author = Wolkoff,P. Clausen,P.A. Nielsen,P.A. Gunnarsen,L. 
Company or Institute = 
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Last updated 1997-01-17