State system for ensuring the uniformity of measurements. Dispersion content of gas atmospheres. Determination of nanoparticle size by diffusion spectral analysis

This standard applies to the method for determining the size of nanoparticles in the range from 5 to 200 nm in gaseous media by their diffusion coefficient. The method is applicable for the analysis of aerosols with a unimodal particle size distribution. The method is implemented using analyzers, the main element of which is a multistage grid-type diffusion battery for separating aerosol particles by size. Each stage of the diffusion battery is a set with a different number of wire meshes. The standard does not prescribe specific methods for measuring particles in specific gas environments.