Large Particle Penetration During PM10 Sampling |
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| Authors: | William B Faulkner Raleigh Smith John Haglund |
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| Affiliation: | 1. Department of Biological and Agricultural Engineering, Texas A&2. M University, Texas, USA;3. Department of Mechanical Engineering, Texas A& |
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| Abstract: | The objective of the present study was to characterize the performance of a federal reference method (FRM) PM10 size-selective inlet using analysis methods designed to minimize uncertainty in measured sampling efficiencies for large particles such as those most often emitted from agricultural operations. The performance of an FRM PM10 inlet was characterized in a wind tunnel at a wind speed of 8 km/h. Data were also collected for 20 and 25 μm particles at wind speeds of 2 and 24 km/h. Results of the present sampler evaluation compared well with those of previous studies for a similar inlet near the cutpoint, and the sampler passed the criteria required for certification as a FRM sampler when tested at 8 km/h. Sampling effectiveness values for particles with nominal diameters of 20 and 25 μm exceeded 3% for 8 and 24 km/h wind speeds in the present study and were statistically higher than both the “ideal” PM10 sampler (as defined in 40 CFR 53) and the ISO (1995) standard definition of thoracic particles (p < 0.05) for 25 μm particles leading to the potential for significant sampling bias relative to the “ideal” PM10 sampler when measuring large aerosols. Copyright 2014 American Association for Aerosol Research |
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