Abstract
In recent years, indoor air pollution caused by substitute materials for guideline VOCs, household products, and microbially derived VOCs has been observed. To assess health risks posed by such diverse VOCs, comprehensive and continuous monitoring of indoor chemical pollution is essential. In this study, sampling rates (SR) for 93 VOCs frequently detected in indoor air were calculated through exposure experiments using passive sampling. The experimentally determined SR shows high linearity (R2 > 0.95) and reproducibility (RSD < 15%) for all target compounds. Validation in a simulated indoor environment showed that the deviation from SR obtained via the exposure chamber method was within 15%, indicating the applicability of these SR to actual indoor environments. A comparison between theoretical SR and experimental SR revealed significant discrepancies for low boiling point compounds. Further analysis of the relationship between molecular volume (volume3D) and SR identified molecular volume as a key factor contributing to the reduction of SR, particularly for chain hydrocarbons and cyclic siloxanes.
