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Abstract

Sorption of vapours of 8 volatile organic compounds (VOCs) has been studied on glass, carpet, gypsum board and a wall covering in small test chambers. The adsorption factors [K(ads) = (mg.m{2})/(mg.m{-3}] strongly depend on the VOC vapour pressure and less on their octanol/water partition. The K(ads), constant in a limited concentration range, decreases at higher concentrations. Large errors are shown to be possible if the adsorption on chamber walls is not accounted for. Under strictly standardized conditions, the adsorbed mass estimated through the two-sink model is well reproducible. When, after an adsorption experiment desorption is carried out, by flushing with clean air, the longer the adsorption time the smaller appears the desorbed fraction after a given desorption time.

Additional information

Authors: KEPHALOPOULOS S, JRC Ispra (IT);KNOEPPEL H, JRC Ispra (IT);DE BORTOLI M, JRC Ispra (IT)
Bibliographic Reference: Paper presented: Indoor Air '96, Auchi (JP)
Availability: Available from (1) as Paper EN 39829 ORA
Record Number: 199611128 / Last updated on: 1996-10-28
Category: PUBLICATION
Original language: en
Available languages: en