New Methods for Quantitative Respirator Fit Testing.
Department of Environmental Health, College of Medicine, University of Cincinnati 1992 Aug:6 pages
A final performance report on the development and application of methods for quantitative respirator fit testing was presented. The types of respirators that were used for testing included disposable respirators consisting mostly or entirely of contoured filtering material and half mask respirators which had air purifying cartridges attached to an impermeable body of rubber or silicone. Development of a condensation nuclei counting technique for fit testing eliminated the need for the traditional aerosol generator and exposure tent; this simplification and associated cost reduction increased the use of quantitative fit testing. Several techniques were developed that did not involve aerosols, but measured face seal leak flow as a measure of respirator fit. A quantitative fit testing technique was developed that measured leak flow and cartridge flow. A size fractionating aerosol generator was also developed and applied successfully to studies of the performance of filtering facepieces. A high flow rate probe was designed to sample aerosols inside facepieces without biases due to leak and probe locations. Using the research findings, a fit testing technique for disposable filtering respirators was developed. The author concludes that fast, reliable, and low cost fit testing techniques help to ensure that selected respirators provide adequate protection in the workplace.
NIOSH-Grant; Respirators; Air-purifying-respirators; Air-filters; Laboratory-techniques; Analytical-methods; Face-masks; Quantitative-analysis; Analytical-processes;
Environmental Health University of Cincinnati Dept of Environmental Health Cincinnati, Ohio 45267
Final Grant Report;
Respirator Research; Respirators;
Department of Environmental Health, College of Medicine, University of Cincinnati
University of Cincinnati, Cincinnati, Ohio