Test method to measure the efficiency of air filtration media against spherical nanomaterials - Part 1: Size range from 20 nm to 500 nm
STANDARD published on 1.9.2019
Designation standards: ČSN EN ISO 21083-1
Classification mark: 127013
Catalog number: 507539
Publication date standards: 1.9.2019
The number of pages: 68
Approximate weight : 204 g (0.45 lbs)
Country: Czech technical standard
Category: Technical standards ČSN
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