title: Problems using Mie scattering photometers for in-place HEPA filter tests and aerosol studies.
mesh_terms: D000336:Aerosols / Q000032:analysis*; D000397:Air Pollution / Q000032:analysis*; D005374:Filtration; D008722:Methods; D008854:Microscopy, Electron; D010783:Photometry / Q000295:instrumentation*
chemical_list: D000336:Aerosols