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Polarized Light Microscopy Of Asbestos
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NMAM 7400: ASBESTOS and OTHER FIBERS by PCM
www.cdc.govindex of airborne fibers. It is primarily used for estimating asbestos concentrations, though PCM does not differentiate between asbestos and other fibers. Use this method in conjunction with electron microscopy (e.g., Method 7402) for assis-tance in identification of fibers. Fibers < ca. 0.25 µm diameter will not be detected by this method [4].