Though this is not a sufficient test to establish conformity with NIOSH,
EN149 or GB2626 standards, we have shown that results using this set-up conforms
well to NIOSH pre-approval results (see in the Supplementary materials).
We have collected data on a set of N95 masks(n = 10) exposed to various sterilization procedures using the equipment described her and a test to NIOSH standards at a commercial laboratory(ICS Laboratories, USA) equipped to perform pre-certification testing. Mask instantaneous filtration efficiency values measured using the two tests had a correlation coefficient of 0.89 and all masks that passed our testing also passed ICS tests. Nonetheless, the data described here results should be interpreted as a relative, not absolute, measure of filtration efficiency.
All of the information below can be found in this paper.