Question: When collecting air samples with sorbent tubes, e.g. NIOSH Method 1501 the flow rates are usually lower compared to flow rates for aerosol sampling (e.g.

When collecting air samples with sorbent tubes, e.g. NIOSH Method 1501

When collecting air samples with sorbent tubes, e.g. NIOSH Method 1501 the flow rates are usually lower compared to flow rates for aerosol sampling (e.g. NIOSH Method 0500). What could be the reason for that? a. Allow sufficient time components of interest to be adsorbed on the sampling medium. b. Sample for very low concentration levels. c. Flow rate is not relevant when it comes to sampling for gases and vapors. d. All of the above

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