Table 2 Comparison between the parameters used in five studies investigating the filtration efficiency of FFRs following gamma irradiation.
From: Effect of gamma irradiation on filtering facepiece respirators and SARS-CoV-2 detection
Study | Radiation Dose (kGy) | Dose rate (kGy/h) | particle size (µm) | filter face velocity (m/s) | Flow rate (L/min) | Ambiance (aerosol vs PM air) | Particle counter | Reference |
|---|---|---|---|---|---|---|---|---|
1 | 1, 10 and 50 | 2.2 | 0.1, 0.5 and 1 | 0.4 | 2.8 | APM | Aerotrak 9306 (TSI) | |
2** | 15 and 25 | 1.94 | 0.3, 0.5 and 1 | 0.5 and 2.6 | 20 and 90 | Aerosol | OPC* | |
3** | 15 and 25 | 1.94 | 0.3,0.5, 1, 3, 5 and 10 | 0.50 | 20 and 90 | Aerosol | OPC* | |
4 | 15 and 25 | 1.94 | 0.3, 0.5, 1 and 5 | 0.50 | 20 and 90 | Aerosol | OPC* | |
5 | 25 | 1.8 | 0.075–0.3*** | 0.17 | 100 | Aerosol | Aerotrak 8020 (TSI) | |
The current study | 0.5, 1,2,3,4,5,7.5 and 15 | 1.65 and 0.5088 | 0.3, 0.5, 0.7, 1, 2 and 5 | 0.4 | 2.8 | APM | Aerotrak 9306 (TSI) | NA |
