Table 1 Experimental design for integrity test after UV treatment on N95 respirators (9210 and 8110S models).

Respirator model	Designation	Number of UV cycles^a	Total UV fluence per side (mJ cm⁻²)	Total UV fluence applied (mJ cm⁻²)	Replicates
9210	Fit Test	5	5000–5710	10,000–11,420	2
	Fit Test	10	10,000–11,420	20,000–22,840	2
	Integrity	0	0	0	1
		5	5000–5710	10,000–11,420	1
		10	10,000–11,420	20,000–22,840	1
	Air Flow	0	0	0	3
		5	5000–5710	10,000–11,420	3
		10	10,000–11,420	20,000–22,840	3
	Strap tensile loading test	0	0	0	4
		5	5000	10,000	6
		10	10,000	20,000	6
8110S	Fit Test	5	5000–5710	10,000–11,420	2
	Fit Test	10	10,000–11,420	20,000–22,840	2
	Integrity	0	0	0	1
		5	5000–5710	10,000–11,420	1
		10	10,000–11,420	20,000–22,840	1
	Air Flow	0	0	0	3
		5	5000–5710	10,000–11,420	3
		10	10,000–11,420	20,000–22,840	3
	Strap tensile loading test	0	0	0	4
		5	5000	10,000	3
		10	10,000	20,000	3

^aEach UV cycle consisted of a 180-s treatment duration per side of the respirator. In treating each side of the respirator, a full UV cycle (360 s) delivered a fluence of 1000 and 1142 mJ cm⁻² to the farthest and closest point on the respirator to the light source, respectively. Over five cycles, the total fluence applied to each respirator was 10,000 mJ cm⁻² (for the region of the respirator farthest from the light source) and 11,420 mJ cm⁻² (for the area of the respirator closest to the light source). Similarly, 10 UV cycles delivered a total fluence for each FFR of 20,000 to 22,840 mJ cm⁻².

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