AAAR 37th Annual Conference October 14 - October 18, 2019 Oregon Convention Center Portland, Oregon, USA
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The Effect of Particle Size on Aerosol Concentration
TERRENCE GARCIA, Ashley Alli, Sabrina MAJ McGraw, Laulima Government Solutions
Abstract Number: 832 Working Group: Aerosol Physics
Abstract Particle size is one of the key components for characterizing the behavior of aerosols, particularly in regards to the dose received by an animal. Different sizes of aerosolized particles result in a difference in aerosol concentration, which is effected by the mass concentration and the number concentration. All of these factors can have an effect on the dose due to the quantity and quality of particles that the subject may inhale. The size, number and mass of the aerosolized particles will all have an impact on particle deposition. Aerosolized particles deposit in the respiratory system by impaction, sedimentation and diffusion. The predominant method of deposition is influenced by the particle size. Larger particle sizes deposit in the nasopharynx or upper respiratory tract. In contrast, smaller particles deposit in the lower respiratory tract. However, a particle size that is too small will result in no or limited deposition. Due to the significant influence particle size has on deposition, we evaluated a wide range of particle sizes to determine aerosol concentration as it relates to of mass and number concentration.