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- W4254317466 abstract "A study was conducted at a mineral sands separation plant to evaluate the workplace performance of half-mask filter cartridge respirators. Inhalation exposure was estimated by measuring the dust and radioactivity concentration inside the respirator while it was worn or hanging around the worker's neck. The program protection factor was determined by simultaneously measuring inside-mask and ambient (outside-mask) concentrations. A total of 27 tests were conducted, covering three brands of half-mask respirators; facial hair on test subjects ranged from clean-shaven to bearded. Program protection factors varied from 1.8 to 13 for dust exposure and 2.5 to 21 for radioactivity exposure. The geometric mean program protection factor over all tests was 5.1 (geometric standard deviation [GSD] = 1.7) for dust exposure and 7.5 (GSD = 1.7) for radioactivity exposure. A minimum program protection factor of 3.5 could be applied to ambient airborne concentration data to obtain a conservative, but more realistic, estimate of inhalation exposure on a worker category basis." @default.
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- W4254317466 date "1992-11-01" @default.
- W4254317466 modified "2023-09-27" @default.
- W4254317466 title "Determination of Program Protection Factors for Half-Mask Respirators Used at a Mineral Sands Separation Plant" @default.
- W4254317466 doi "https://doi.org/10.1202/0002-8894(1992)053<0713:doppff>2.0.co;2" @default.
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