标准摘要
[中文适用范围]： 本文件规定了测定平板过滤介质对 20 nm 至 500 nm 范围内空气纳米颗粒的分数过滤效率的测试仪器和程序。 本文件中的测试方法仅限于球形或近球形颗粒，以避免颗粒形状带来的不确定性。 [外文原描述]： 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.
英文名称Test method to measure the efficiency of air filtration media against spherical nanomaterials — Part 1: Size range from 20 nm to 500 nm