Abstract
FOR the calibration of sizing instruments and for laboratory experiments, the use of well defined aerosols is highly desirable. Not only should all particles be of the same phase and chemical composition, but also the same size and shape. Preferably all particles should be spherical and of identical diameters. For this purpose a whole class of condensation aerosol generators, known as LaMer-type generators, are widely used1. It is anticipated that the particles formed by the generator have the same density as the bulk material; and it is generally assumed that once the aerosol exhibits higher order Tyndall spectra (HOTS) the particle size distribution resembles a rather monpdispersed aerosol2. The fact that HOTS are observed is not necessarily an indication of a very narrow distribution, however, since for σ= 15% HOTS are still recognizable3.
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References
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MATTESON, M., FOX, J. & PREIMING, O. Density Distribution of Sodium Chloride Aerosols formed by Condensation. Nature Physical Science 238, 61–63 (1972). https://doi.org/10.1038/physci238061a0
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DOI: https://doi.org/10.1038/physci238061a0
