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Inhalable Fibrous Material.
Pneumoconiosis, Proceedings of the International Conference, Johannesburg 1969 1970:70-73
The occurrence of respirable fibrous materials in the environment was discussed. Sources of inhalable fibrous materials were reviewed. Natural minerals constitute a major source of respirable fibers. There are more than 100 different natural minerals that have some degree of fibrous character. Silicates constitute the most important group of fibrous materials and are the most important constituent of the earth's rocks and crust. Exposures to respirable fibers arise from natural forces such as dust storms, industrial processes, and personal habits, such as using talcum powder. Synthetic mineral fibers and their uses were mentioned. Synthetic organic fibers and their uses were summarized. Fibrous animal and vegetable materials were discussed. Typical examples of respirable fibrous materials associated with commercial and domestic products were illustrated. Analytical techniques for identifying fibrous materials were summarized, including electron microscopy, electron diffraction, laser spectroscopy, electron microprobe, and laser microprobe used in conjunction with time of flight mass spectrometry. It was noted that because of the very small size of individual respirable fibers, a single method is usually not sufficient to identify individual fibers, especially inhaled fibers which are usually transformed by biological processes.
Fibrous-dusts; Dust-inhalation; Airborne-fibers; Analytical-methods; Nonmetallic-minerals; Silica-dusts; Environmental-exposure; Synthetic-fibers;
Pneumoconiosis, Proceedings of the International Conference, Johannesburg 1969
Page last reviewed: April 12, 2019
Content source: National Institute for Occupational Safety and Health Education and Information Division