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- W3022200853 abstract "The aim of this study was to investigate the protection efficiency of two types of face masks against composite dust and to characterize the particles that penetrated through the masks. Composite dust was created by grinding a commercial nano‐filled composite in a plexiglass box without using water cooling or high vacuum evacuation, in order to obtain a worst‐case exposure. Dust particles were collected using a personal inhalable aerosol sampler (IOM) fixed inside a custom‐made phantom head. Surgical and filtering facepiece (FFP3) masks were tested, and the situation without a mask served as control. The IOM sampler contained a cassette with two filters to collect large inhalable (4–100 µ m) and respirable dust particles (<4 µ m). The amount of particles was determined gravimetrically by weighing filters before and after composite grinding, and further characterized by electron microscopy. Particle collection for both inhalable and respirable dust was the highest when no mask was used, and the lowest with the use of a FFP3 mask. Different sizes and shapes of particles were observed, with the largest particles (>1 µ m) being seen when no mask was applied, whereas only nanoparticles could be detected when either type of face mask was applied. Even though FFP3 masks showed a higher filtration efficacy than surgical masks of the inhalable dust fraction, penetration of a small respirable particle fraction was inevitable for both masks." @default.
- W3022200853 created "2020-05-13" @default.
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- W3022200853 date "2020-05-07" @default.
- W3022200853 modified "2023-10-17" @default.
- W3022200853 title "Filtration efficiency of surgical and FFP3 masks against composite dust" @default.
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- W3022200853 doi "https://doi.org/10.1111/eos.12697" @default.
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