Table 1.

Chemical compositions (wt %) of studied N95 mask samples.

Sample code	N95 Mask Samples	C	N	O	Cl	H
N1	PA66	0.6372	0.1239	0.1416	–	0.0973
N2	PVC	0.3840	–	–	0.5680	0.0480
N3	UHDPE	0.8571	–	–	–	0.1429
N4	PET	0.6250	–	0.3333	–	0.0417
N5	PCEL	0.4444	–	0.4938	–	0.0617