Table 3. Filtration performance of the masksa.
| EN 14683:2005 | ASTM F2101 | ASTM F2299 | |||||
| Sample | BFE (%) | ΔP (Pa/cm2) | BFE (%) | ΔP (mm H2O/cm2) | Average Sample Counts | Average Control Counts | Filtration Efficiency (%) |
| 1 | >99.9 | 41.5 | 98.2 | 4.6 | 1310 | 10438 | 87 |
| 2 | >99.9b | 39.5 | 98.6 | 4.3 | 422 | 10434 | 96 |
| 3 | >99.9b | 41.1 | 98.5 | 4.3 | 565 | 11636 | 95.1 |
| 4 | 99.2 | 38.1 | 98.6 | 4.3 | 681 | 12426 | 94.5 |
| 5 | >99.9b | 39.5 | 98.7 | 4.2 | 544 | 11153 | 95.1 |
| Mean | 99.7 | 39.94 | 98.52 | 4.26 | 704 | 11217 | 93.54 |
| ±SD | 0.3 | 1.37 | 0.19 | 0.055 | 350 | 846 | 3.7 |
a
Each test was done using 5 replicate masks. The result for each of the replicate mask is shown.
b
There were no detected colonies on any of the Andersen sampler plates for this sample.