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Obtaining dispersion of an intensive particle property from a tandem-sizing experiment.
Stolzenburg MR; McMurry PH; Emery MS; Ku BK; Maynard AD
Proceedings of the Seventh International Aerosol Conference, September 10-15, 2006, St. Paul, Minnesota. Biswas P, Chen DR, Hering S, eds. Mount Laurel, NJ: American Association for Aerosol Research, 2006 Sep; :387-388
A tandem-sizing experiment is one in which the size of a particle is measured twice. The two sizes may be derived by different techniques or they may use the same technique before and after inducing a change in the particle. A Differential Mobility Analyzer (DMA) selecting particle electric mobility, Z(p) followed by an Aerosol Particle Mass (APM) analyzer selecting particle specific mass, s (mass/charge), is an example of the first type of tandem-sizing experiment. A Tandem Differential Mobility Analyzer (TDMA) consisting of two DMAs in series with an aerosol humidifier in between to potentially grow the particles is an example of the second type. Size, however it is defined, is an extensive particle property. Typically, the two sizes obtained in the experiment are used to derive an intensive particle property such as effective particle density in the DMAAPM experiment or particle growth factor in the TDMA experiment above. Most data analysis of such experiments concentrates on obtaining the mean of the intensive property in question as a function of particle size. This work shows a method to estimate the range or dispersion in that property as well.
Analytical-processes; Analytical-instruments; Aerosols; Aerosol-particles; Particulate-dust; Particulates; Author Keywords: Effective Density; Fractal Dimension; Tandem Differential Mobility Analyzer; Aerosol Particle Mass Analyzer
Biswas P; Chen DR; Hering S
Proceedings of the Seventh International Aerosol Conference, September 10-15, 2006, St. Paul, Minnesota
MN; OH; DC
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