Particulate Filter Research Recommendations.
Arthur D. Little, Inc., Case 78466-04 1975 Nov:28 pages
Recommendations for experimental approaches to the laboratory measurement of the effects of aerosol parameters on particulate collection efficiency of respirators are given. A review of the literature shows that aerosol filtration efficiency depends on particle size, shape, density, electrical charge and aerosol velocity. Diagrams and equations show single fiber collection efficiency; particle collection by interception, impaction and diffusion; and effect of particle size and velocity on collection efficiency. It is recommended that filters be tested with various aerosols having different values of the above parameters. Test aerosols of diocytl-phthalate, stearic-acid, sodium-chloride and other inorganic salts, and fibrous materials such as asbestos or fiber glass are recommended. Condensation generators are recommended for all the aerosols except the fibrous materials, which should be prepared by dust dispersal techniques. Recommendations are also given for equipment for aerosol concentration, particle size, and electrical charge measurements. Future research on aerosol generation should be centered on improving the condensation generators. (Contract No 210-75-0080)
NIOSH-Contract; Analytical-methods; Contract-210-75-0080; Physical-properties; Airborne-particles; Respiratory-protective-equipment; Aerosol-generators;
117-84-0; 57-11-4; 7647-14-5; 1332-21-4;
NTIS Accession No.
Arthur D. Little, Inc., Case 78466-04