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In order to calculate the aerosol bulk densities of PM1.0 and PM10, aerosol mass and number concentrations were measured for the period of December 2008~April 2009. PM1.0 and PM10 mass concentrations were measured using a cascade impactor (Micro-Orifice Uniform Deposit Impactor, MOUDI) while their volume concentrations were calculated based on number concentrations from an environmental dust monitor (EDM). Normal aerosol size distribution fitting functions were retrieved for number size distribution since aerosols ⁄2.5 μm were measured from the EDM. Strong correlation was found between PM10 mass and volume concentrations obtained with a R 2 of 0.95. The calculated average bulk densities of PM1.0 and PM10 were 1.97±0.33 g/cm 3 and 2.15±0.18 g/cm, respectively.

Aerosol Density Determined Using Micro-orifice Uniform Deposit Impactor and Aerosol Dust Monitors Data at Seoul