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Environmental Sampling and Analysis of Particulate Matter: Asbestos.
Transactions of the 35th Annual Meeting of Industrial Health Foundation, Inc., October 13-14, 1970, Chatham Center, Pittsburgh, Pennsylvania, Transactions Bulletin No. 44, Industrial Hygiene Foundation of America, Inc., Pittsburgh, Pennsylvania 1971:81-86
Methods for determining the concentration of asbestos (1332214) fibers in air were discussed and the difficulties of the operation considered. A review was made of previously published relationships between the methods of counting in order to exhibit the effect of product and operation, reveal the bias of the methods, and evaluate the usefulness of the indices derived. Early epidemiological studies were based on the impinger method of analysis necessitating the development of ratios between present methods of measurement and impinger counts. Early impinger studies did not have many particles to count, primarily due to the inefficiency of the impinger in the collection of particles of such small aerodynamic size. The use of membrane filters and phase contrast illumination improved the efficiency of the analyses. Fibers over 1 micron thick may sometimes be identified by dispersion staining. Count ratios of impinger to membrane filter techniques were offered for asbestos fibers in spun and woven textile products, asbestos fibers in brake linings and clutch facings generation by friction, and fibers found in asbestos cement pipe samples. The influence of fiber size and weight on analytical results of fiber counting was considered.
Airborne-fibers; Sampling-methods; Textiles-industry; Air-sampling-techniques; Construction-materials; Analytical-methods; Asbestos-fibers;
Transactions of the 35th Annual Meeting of Industrial Health Foundation, Inc., October 13-14, 1970, Chatham Center, Pittsburgh, Pennsylvania, Transactions Bulletin No. 44, Industrial Hygiene Foundation of America, Inc., Pittsburgh, Pennsylvania
Page last reviewed: April 12, 2019
Content source: National Institute for Occupational Safety and Health Education and Information Division