ASTM 7201

Sampling and Counting Airborne Fibers Including Asbestos Fibers, in the Workplace, by Phase Contrast Microscopy and Transmission Electron Microscopy (with an Option of Transmission electron microscopy)

• This ASTM standard is based on other PCM methods including the NIOSH 7400, OSHA ID-160 and ISO 8672.
• For the determination of the concentration of fibers/ml of air by PCM and optionally by TEM
• PCM results that exceed a limit value can be modified by a subsequent TEM analysis that determines the percentage of asbestos fibers to non-asbestos fibers present.

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