Table. Single-Pass Filtration Efficiencies for Ambient Particles of Irradiated N95 Masks .
| Mask model and dosea | Single-pass filtration efficiency, mean (SD), % | Air pressure differential, Pa | Air flow velocity, m/s | Temperature, °C | RH, % | ||
|---|---|---|---|---|---|---|---|
| 0.3 μm | 0.5 μm | 1 μm | |||||
| 9105, 0 kGy | |||||||
| Mask 1 | 85.9 (3.9) | 89.5 (4.5) | 94.3 (4.1) | 175.5 | 0.4 | 23.7 | 11.5 |
| Mask 2 | 88.3 (3.5) | 90.2 (3.6) | 94.7 (3.6) | 185.8 | 0.4 | 23.9 | 19.5 |
| 1805, 1 kGy | |||||||
| Mask 1 | 29.2 (1.4) | 41.1 (1.4) | 70.3 (8.2) | 186.1 | 0.1 | 23.9 | 20.4 |
| Mask 2 | 31.1 (1.8) | 43.0 (4.4) | 72.1 (10.6) | 186.6 | 0.1 | 23.8 | 20.6 |
| 9105, 10 kGy | |||||||
| Mask 1 | 28.3 (1.1) | 38.6 (2.5) | 74.3 (8.1) | 176.8 | 0.4 | 23.2 | 12.1 |
| Mask 2 | 22.2 (1.1) | 35.5 (3.2) | 63.1 (11.1) | 186.0 | 0.4 | 23.9 | 20.4 |
| 9105, 50 kGy | |||||||
| Mask 1 | 24.8 (1.0) | 36.7 (2.7) | 69.5 (11.4) | 176.8 | 0.4 | 23.1 | 12.4 |
| Mask 2 | 23.8 (0.8) | 35.1 (1.9) | 72.0 (12.2) | 184.2 | 0.4 | 23.9 | 20.2 |
| 8210, 0 kGy | |||||||
| Mask 1 | 88.1 (1.9) | 91.4 (1.8) | 89.2 (2.7) | 173.9 | 0.4 | 22.9 | 11.3 |
| Mask 2 | 85.0 (2.2) | 85.4 (1.7) | 86.2 (3.5) | 191.7 | 0.4 | 23.6 | 21.1 |
| 8210, 1 kGy | |||||||
| Mask 1 | 30.8 (0.8) | 43.1 (3.7) | 75.0 (9.5) | 185.0 | 0.4 | 23.7 | 21.2 |
| Mask 2 | 26.2 (1.4) | 37.4 (2.0) | 61.6 (10.7) | 187.1 | 0.4 | 23.7 | 21.4 |
| 8210, 10 kGy | |||||||
| Mask 1 | 35.2 (0.9) | 45.0 (2.8) | 81.0 (5.7) | 179.2 | 0.4 | 23.1 | 11.7 |
| Mask 2 | 23.3 (1.6) | 34.3 (2.5) | 56.3 (13.0) | 185.5 | 0.4 | 23.7 | 21.4 |
| 8210, 50 kGy | |||||||
| Mask 1 | 28.2 (1.1) | 36.0 (2.3) | 66.0 (9.9) | 186.1 | 0.4 | 23.6 | 21.4 |
| Mask 2 | 29.6 (1.0) | 45.2 (2.1) | 71.9 (9.2) | 186.4 | 0.4 | 23.7 | 21.2 |
Abbreviation: RH, relative humidity.
a
All masks were manufactured by 3M.