Figures & data
FIG. 1 Schematic of the ultrafine particle concentrator (UFPC) for human exposure.
FIG. 2 Performance of the UFPC using Model 9710 circulator (Ideal Enrichment Factor = 20).
FIG. 3 Concentration enrichment as a function of particle diameter for three minor-to-total flow ratios (r).
FIG. 4 Size distribution for ambient and concentrated aerosol using UFPC (minor-to-total flow ratio = 5%).
FIG. 5 Measurements of ambient and enriched concentrations of EC and PAHs versus time (minor-to-total flow ratio = 5%).
FIG. 6 Measurements of ambient and enriched concentrations of EC and PAHs versus time (minor-to-total flow ratio = 3.3%).
FIG. 7 Measurements of ambient and enriched concentrations of EC and PAHs versus time (minor-to-total flow ratio = 2.5%).
FIG. 8 Comparison of ambient and enriched ultrafine PM mass concentration for a minor-to-total flow ratio of 5%.
FIG. 9 Comparison of ambient and enriched ultrafine nitrate and sulfate mass concentration for a minor-to-total flow ratio of 5%.
