Review, Summarization, and Evaluation of Literature to Support the Update and Revision of Criteria Documents X. Silica.
NIOSH 1977 Mar:58-58
Occupational exposure to silica (7631869) is reviewed. The current NIOSH dust count sampling method is compared with the respirable mass measurement method. Criticism of the NIOSH 50 micrograms per cubic meter standard is included. The analytical parameters for the three NIOSH methods of analysis, X-ray diffraction, infrared spectroscopy, and a wet colorimetric technique, are summarized. The three methods are compared for their ability to determine silica in respirable Georgia granite dust. Other analytical methods such as differential thermal analysis are discussed. The physiological effects of silica exposure as determined by epidemiological investigations and case studies in humans and laboratory experiments in animals are presented. The authors emphasize the need for adequate protection for sandblasters and those who work in the vicinity of sandblasting operations. They recommend that a less toxic blasting abrasive be developed.
NIOSH-Contract; Contract-210-76-0167; Silicates; Mineral-dusts; Dust-counting; Dust-sampling; Dust-analysis; Air-sampling; Medical-research;
Syracuse Research Corporation, Center for Chemical Hazard Assessment, Syracuse, New York, NIOSH, Rockville, Md.