Table 1.
Gravimetric assessment of the exposure concentration
| Exposure | Experiment | Duration, days | HEPA, μg/m3 | Ambient, μg/m3 | CAP, μg/m3 | Enrichment Factor |
|---|---|---|---|---|---|---|
| 1 | Plasma incubation I | 9 | 1.9 | 8.8 | 83.7 | 5.3-fold |
| 2 | Plasma incubation II | 9 | 1.6 | 14.1 | 74.6 | 5.3-fold |
| 3 | Metabolome I, CAP60 | 9 | 1.9 | 8.3 | 61.8 | 7.4-fold |
| 4 | Metabolome II, CAP100 | 9 | 8.9 | 19.0 | 97.0 | 5.1-fold |
Data for the fine particulate matter (PM2.5) concentration in the ambient air, the HEPA-filtered air, and the concentrated ambient PM2.5 (CAP) chambers during the specific 9-day exposures. Data are based on gravimetric filter measurements defined as mass divided by air flow (L/min) and the enrichment factor indicates the fold increase by which the versatile aerosol enrichment system (VACES) concentrates PM2.5 from the ambient air.