Aerosol Sampling: Comparison of Two Rotating Impactors for Field Droplet Sizing and Volumetric Measurements
FLORIDA AGRICULTURAL AND MECHANICAL UNIV PANAMA CITY FL PUBLIC HEALTH ENTOMOLOGY RESEARCH AND EDUCATION CENTER
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This article compares the collection characteristics of a new rotating impactor Florida Latham Bonds FLB sampler for ultrafine aerosols with a mimic of the industry standard Hock-type. The volume and droplet-size distribution collected by the rotating impactors were measured via spectroscopy and microscopy. The rotary impactors were colocated with an isokinetic air sampler for a total volume flux measurement and a laser diffraction instrument for droplet-size distribution measurement. The measured volumetric flux and droplet-size distribution collection efficiencies were compared across 3 wind speeds 1, 1.8, and 3.5 msec. The FLB sampler had higher flux collection efficiencies than the Hock-type sampler. The FLB sampler collected 89, 87, and 98 of the total volume available per unit area at 1, 1.8, and 3.5 msec, respectively, whereas the Hock-type sampler collected 68, 19, and 21 of across the same wind speeds. Changes in wind speed had less impact and resulted in less data variability for the FLB sampler.
- Agricultural Chemistry
- Test Facilities, Equipment and Methods