Test method to measure the efficiency of air filtration media against spherical nanomaterials - Part 1: Size range from 20 nm to 500 nm (ISO 21083-1:2018)

Standard Number EVS-EN ISO 21083-1:2018
Organization Estonian Centre for Standardisation Estonia
Level National
Category Test Method | Characterization | Measurement
  • JAN 2018 Published
This document specifies the testing instruments and procedure for determining the fractional filtration efficiencies of flat sheet filter medium against airborne nanoparticles in the range of 20 nm to 500 nm. The testing methods in this document are limited to spherical or nearly-spherical particles to avoid uncertainties due to the particle shape.