الفهرس 
Infrared Determination of Crystalline Silica in Respirable Dust
IntroductionOnly 14 pages are availabe for public view
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Abstract
Crystalline free silica is condidered as a lung carcinogen and the occupational exposure to its dust is a health hazand to workers employed in industries that involve ores of mineral dust in Egypt, thousands of people work under conditions of silica dust exposure exceeding the occuoational exposure limit, as a result the monitoring of the occuoational exposure to crystailine silica dust is required by government legistation. The assessment of the later is a multi-phase process, depend on workplace measurements, quantitative analyses of samples, and companson of results with the permissible limits. This study aims to investigate occuoational exposure to crystailine silica dust at 22 factones in Egypt with different industrial activites like stone cutting glass making ceramic, and sand blasting. Dust samples were collrcted from work sites at the breathing zone using a personal sampling pump and a size-selective cyclone and analyzed using FTIR