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. 2022 May 30;12(6):571. doi: 10.3390/membranes12060571

Figure 2.

Figure 2

Filtration efficiency vs. pressure drop for PLA NF filter media tested in accordance with the following international standards: (A) ASTM F2299 [40], (B) NIOSH 42CFR84 [42] and (C) ASTM F3502 [41].