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Determination of particle mass, effective density, mass–mobility exponent, and dynamic shape factor using an aerodynamic aerosol classifier and a differential mobility analyzer in tandem
Ist Teil von
Journal of aerosol science, 2014-09, Vol.75, p.35-42
Ort / Verlag
Oxford: Elsevier Ltd
Erscheinungsjahr
2014
Link zum Volltext
Quelle
Elsevier ScienceDirect Journals Complete
Beschreibungen/Notizen
A differential mobility analyzer (DMA) and an aerodynamic aerosol classifier (AAC) are used in tandem to measure the effective density, dynamic shape factor, and mass of soot and dioctyl sebacate (DOS) particles. Soot particles were generated from an inverted burner. The mass–mobility exponent of the soot particles was determined to be 2.17. The effective density of soot decreases from 0.86±0.08 to 0.18±0.02g/cm3 over the range of 95–637nm in mobility diameter and the shape factor increased from 1.51±0.06 to 2.62±0.10 over the same range. The effective density of the DOS particles was determined to be 0.903±0.90g/cm3 (which is within uncertainty of the material density of DOS), the mass–mobility exponent was 3.01, and the dynamic shape factor was 1.03±0.05, which illustrate the spherical shape of the DOS droplets.
•Tandem measurements using an aerodynamic aerosol classifier and differential mobility analyzer are made for the first time.•Tandem data is analyzed to calculate particle mass, effective density, mass–mobility exponent, and dynamic shape factor.•Measurements of these properties for soot and dioctyl sebacate particles conform to expectations.