Table IV.
Ultraviolet germicidal irradiation (UVGI) interventions and N95 filtering facemask respirators used to evaluate UVGI decontamination on viral or bacterial load
| Author and year | Wavelength (nm) | Watts (W) | Duration (min)a | Dose (J/m2) | Intensity (mW/cm2) | Distance (cm)b | UVGI study arms | N95 masks evaluated |
|---|---|---|---|---|---|---|---|---|
| Fisher, 2010c | NR | 40 | 1–300 | 1500–5000 | 2.5 | NR | Model A-1: 10 min, 15000 J/m2 Model C 1: 1 min, 1500 J/m2 Model C-2: 2 min, 3000 J/m2 Model C-3: 4 min, 6000 J/m2 Model C-4: 10 min, 15,000 J/m2 Model F 1: 1 min, 1500 J/m2 Model F-2: 2 min, 3000 J/m2 Model F-3: 4 min, 6000 J/m2 Model F-4: 10 min, 15,000 J/m2 |
Cardinal N95-ML (A) 3M 8210 (C) 3M 1870 (F) |
| Heimbuch, 2011d | 254 | 80 | 15 | 18,000 | 1.6–2.2 | 25 | Single UVGI arm | 3M 8000 3M 8210 Moldex 1500 3M 1860 3M 1870 Kimberly Clark PFR |
| Lin, 2018e | 254 | 6 | 1–20 | 11,340 to 226,800 | 18.9 | 10 | Arm 1: UVC 245 nm, 1 min, 11,340 J/m2 Arm 2: UVC 245 nm, 2 min, 22,680 J/m2 Arm 3: UVC 245 nm, 5 min, 45,360 J/m2 Arm 4: UVC 245 nm, 10 min, 113,400 J/m2 Arm 5: UVC 245 nm, 20 min, 226,800 J/m2 |
3M 8210 |
| Lore, 2012 | 254 | 15 | 15 | 18,000 | 1.6–2.2 | 25 | Single UVGI arm | 3M 1860 3M 1870 |
| Mills, 2018 | 254 | NR | 1 | 1000 | 0.39 | 100 cm | Single UVGI arm | 3M 1860 3M 1870 3M VFlex 1805 Alpha Protech 695 Gerson 1730 Cup Kimberly-ClarkPFR Moldex 1512 Cup Moldex 1712 Flat-fold Moldex EZ-22 Precept 65–3395 Prestige Ameritech RP88020 Sperian HC-NB095 Sperian HC-NB295F U.S. Safety AD2N95A U.S. Safety AD4N95 |
| Vo, 2009 | 254 | 40 | 60–300 | 14,400–72,000 | 0.4 | NR | Arm 1: 1 hr (14,400 J/m2) Arm 2: 2 hr (28,800 J/m2) Arm 3: 3 hr (43,200 J/m2) Arm 4: 4 hr (57,600 J/m2) Arm 5: 5 hr (72,000 J/m2) |
N1105 |
| Woo, 2012 | 254 | 4 | 15–120 | 9,000–72,000 | 1.0 | 10 | Arm 1: 15 min, 9,000 J/m2 Arm 2: 30 min, 18,000 J/m2 Arm 3: 60 min, 36,000 J/m2 Arm 4: 120 min, 72,000 J/m2 |
3M 1870 |
NR, not reported.
a
Refers to the duration for which the N95 filtering facemask respirator (FFR) models were exposed to ultraviolet.
b
Refers to the distance from the ultraviolet light to the N95 FFR model(s).
c
Fisher et al. evaluated 22 different UVGI protocols and six different masks, however, germicidal results were only reported for nine arms and three masks.
d
Mask models for the following studies obtained through private correspondence: Heimbuch (2011).
e
Lin et al. also evaluated five UVGI arms using 365-nm ultraviolet-A light.