Test method to measure the efficiency of air filter media for spherical nanomaterials - Part 1: Particle size from 20 to 500 nm
Standard Number | NEN-EN-ISO 21083-1: 2018 |
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Organization |
Netherlands Standardization Institute
|
Level | National |
Category | Test Method | Characterization | Measurement |
Status |
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ABSTRACT
NEN-EN-ISO 21083-1 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.