|
Vaporous hydrogen peroxide (VHP)
|
Usually use commercial hydrogen peroxide steam generator. Directly use VHP to treat the surface of the mask, generally 10–30 min.
|
Passed (Fitting unaffected for up to 20 cycles)
|
Passed
|
Can be maintained (> 99.99%)
|
|
Ultraviolet germicidal irradiation (UVGI)
|
Ultraviolet germicidal irradiation to treat the surface of the mask. 0.5–950 J/cm2 were used
|
depending on model (90–100% can pass)
|
Passed
|
Can be maintained (99.9% for all tested viruses)
|
|
Microwave generated steam
|
microwave models: 1100–1250 W 40 s treatment for 2 min
|
95–100% Passed
|
Passed, even after 20 cycles
|
Can be maintained
|
|
Microwave steam bags
|
microwave models: 1100 W, 90 s treatment, 60 mL tap water was filled in the bags
|
Not evaluated
|
Passed
|
Can be maintained
|
|
Moist heat (MH) incubation
|
15–30 min treatment at 60 °C
|
Passed
|
Passed
|
Can be maintained
|
|
Liquid hydrogen peroxide
|
1 s to 30 min treatment with Liquid hydrogen peroxide concentration of 3–6%
|
Not evaluated
|
Passed
|
Not evaluated
|
|
Ethylene oxide
|
1 h at 55 °C; conc. range: 725–833 mg/L
|
Not evaluated
|
Passed
|
Not evaluated
|
