apparent that the key to getting reliable results was based on the proper calibration
of the automated lter tester to ensure consistent results, as well as continual main-
tenance cleaning of the aerosol transport lines. For both of these nano-sized particle
air ltration tests, the penetration versus particle size curves for the lter media
studied follow the trends of the theoretical Brownian capture model of decreasing
penetration with decreasing particle diameter below 100 nm. There was no evidence
of ‘particle bounce’. The authors suggested the need to collect personal exposure
samples ...
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