Test method to measure the efficiency of air filtration media against spherical nanomaterials - Size range from 3 nm to 30 nm has-hardcopy Pallets safeguard goods travelling through

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Test method to measure the efficiency of air filtration media against spherical nanomaterials - Size range from 3 nm to 30 nm has-hardcopy Pallets safeguard goods travelling through1 Scope This document specifies the testing instruments and procedure for determining the filtration efficiencies of flat sheet filter media against airborne nanoparticles in the range of 3 nm to 30 nm. The testing methods in this document are limited to spherical or nearly spherical particles to avoid uncertainties due to the particle shape.