1996 Edition, December 10, 1996
Standard Test Method for Determining Concentration of Airborne Single-Crystal Ceramic Whiskers in the Workplace Environment by Phase Contrast Microscopy
Includes all amendments and changes through Reapproval Notice , 2011
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Description / Abstract:
This test method covers the sampling methods and analysis
techniques used to assess the airborne concentration of
single-crystal ceramic whiskers (SCCW), such as silicon carbide and
silicon nitride, which may occur in and around the workplace where
these materials are manufactured, processed, transported, or used.
This test method is based on the collection of fibers by filtration
of a known quantity of air through a filter. The filter is
subsequently evaluated with a phase contrast microscope (PCM) for
the number of fibers meeting appropriately selected counting
criteria. This test method cannot distinguish among different types
of fibers. This test method may be appropriate for other man-made
mineral fibers (MMMF).