Size-fractionating aerosol generator.
Pilacinski-W; Ruuskanen-J; Chen-CC; Pan-MJ; Willeke-K
Aerosol Sci Tech 1990; 13(4):450-458
An effective method was developed for the production of aerosols of desired concentration and size distribution. The method combined a pneumatic nebulizer with a solid plate as well as a virtual impaction stage, all operated by the same adjustable air flow rate, but each individually adjusted: gas to liquid flow rate ratio for the nebulizer, nozzle width for the impactor and small aerosol flow to total air flow rate ratio for the virtual impactor. The size fractionating aerosol generator was compact and easy to maintain. Its output could be tailored to give narrow aerosol size distributions of submicrometer or supermicrometer size or it could give wide, bimodel aerosol size distributions with emphasis on aerosols at either end of the size spectrum. A size distribution with a model in the supermicrometer range was obtained by drastically reducing the concentration of the smaller ones. Single particle optical counters require a low concentration of submicrometer particles, while photometers may be used on high concentrations of submicrometer particles.
NIOSH-Publication; NIOSH-Grant; Respirators; Airborne-particles; Aerosol-particles; Air-sampling; Aerosol-sampling; Aerosol-generators
Environmental Health University of Cincinnati Dept of Environmental Health Cincinnati, Ohio 45267
Respirator Research; Respirators
Aerosol Science and Technology
University of Cincinnati, Cincinnati, Ohio