Characteristics, Sampling Efficiencies, and Possible Improvements to the Aerosol to Liquid Particle Extraction System (ALPES)
Final rept. Sep-Oct 2003
EDGEWOOD CHEMICAL BIOLOGICAL CENTER ABERDEEN PROVING GROUND MD
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Sampler characteristics and sampling efficiency measurements of the Aerosol to Liquid Particle Extraction System ALPES were determined wing monodisperse polystyrene latex PSL microspheres and fluorescent oleic acid droplets with fluorometer analysis. Sampling efficiency measurements of ALPES were determined using 0.5- and 1-micrometer PSL microspheres, and 5 micrometers sodium fluorescein tagged oleic acid fluorescent oleic acid particles. The results show that the ALPES has a peak efficiency of 57.4 - 5.1 for 5-micrometer particles. Tests conducted to determine possible improvements to the sampler showed that slowing the air flow rate of the sampler significantly increased the sampling efficiency, and washing the inside of the outer cylinder increased the collection efficiency. Dry versus wet collection tests showed that there is no difference in collection efficiency for these conditions.
- Physical Chemistry
- Fluid Mechanics