@proceedings{22260, author = {Tracy L Thatcher and Melissa M Lunden and Richard G Sextro and Susanne V Hering and Nancy J Brown}, title = {The effect of penetration factor, deposition, and environmental factors on the indoor concentration of pm2.5 sulfate, nitrate, and carbon}, abstract = {

Indoor exposure to particles of outdoor origin constitutes an important exposure pathway. We conducted an intensive set of indoor particle measurements in an unoccupied house under differing operating conditions. Real-time measurements were conducted both indoors and outdoors, including PM2.5 nitrate, sulfate, and carbon. Because the time-scale of the fluctuations in outdoor particle concentrations and meteorological conditions are often similar to the time constant for building air exchange, a steady state concentration may never be reached. The time-series experimental data were used to determine the effect of changes in air exchange rate and indoor/outdoor temperature and relative humidity differences on indoor particle concentrations. A multivariate regression was performed to investigate the difference between measured indoor concentrations and results from a simple time-dependent physical model. Environmental conditions had a significant effect on indoor concentrations of all three PM2.5 species, but did not explain all of the model variation.

}, year = {2002}, journal = {Proceedings of the Indoor Air 2002 Conference, Monterey, CA}, volume = {1}, pages = {846-851}, publisher = {Indoor Air 2002, Santa Cruz, CA}, language = {eng}, }