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Comparison of three essential submicron aerosol measurements: mass, size and shape



Qi Yao, Akua Asa-Awuku, Christopher D. Zangmeister, James Radney


An instrumental trifecta now exists for aerosol separation and classification by mobility diameter (Dm), aerodynamic diameter (Dae) and mass (mp) utilizing a differential mobility analyzer (DMA), aerodynamic aerosol classifier (AAC) or aerosol particle mass analyzer (APM), respectively. In principle, any combination of two measurements yields the third. These quantities also allow for the derivation of the particle effective density (ρeff) and shape factor (χ). Measured and/or derived deviations between tandem measurements are dependent upon the configuration, but generally less than 10 % with non-physical values sometimes being reported. Harmonization of these measurement methods, and their uncertainties, will be required to improve data agreement and enable quantitative comparability between studies.
Aerosol Science and Technology


aerosol, metrology, aerodynamic diameter, mobility diameter, mass


Yao, Q. , Asa-Awuku, A. , Zangmeister, C. and Radney, J. (2020), Comparison of three essential submicron aerosol measurements: mass, size and shape, Aerosol Science and Technology, [online],, (Accessed June 19, 2024)


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Created May 28, 2020, Updated January 20, 2023