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Aerosol concentrations and particle size distributions of BaSO 4 NM-220
| Duration of exposure | Targeted concentrations (mg/m 3 ) | Measured concentrations (mg/m 3 ) | MMAD (μm)/GSD mean | Particle count concentration (particle/cm 3 ) | Particle count median diameter (nm) |
|---|---|---|---|---|---|
| 4 weeks | 50 | 46.2 ± 5.9 | 2.3/2.0 | 92752 | 326 |
| 13 weeks | 50 | 50.1 ± 5.6 | 1.9/2.1 | 77992 | 304 |
