|Standard Number||ISO/TS 21083-2:2019|
|Organization||International Organization for Standardization|
|Category||Test Method | Characterization | Measurement|
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.