title: Aerosol sampling: comparison of two rotating impactors for field droplet sizing and volumetric measurements.
abstract: 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 m/sec). 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 m/sec, 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.
authors.affiliation: College of Engineering Science Technology and Agriculture, John A. Mulrennan Sr. Public Health Entomology Research and Education Center, Adulticide Application and Evaluation Section, Florida A&M University, Panama City, FL 32605, USA.
authors.forename: Jane A S
authors.initials: JA
authors.lastname: Bonds
authors.forename: Mike J
authors.initials: MJ
authors.lastname: Greer
authors.forename: Bradley K
authors.initials: BK
authors.lastname: Fritz
authors.forename: W Clint
authors.initials: WC
authors.lastname: Hoffmann
mesh_terms: D000336:Aerosols / Q000032:analysis*; D004784:Environmental Monitoring / Q000295:instrumentation*
chemical_list: D000336:Aerosols