Fitting Multimodal Lognormal Size Distributions to Cascade Impactor Data

A procedure is described for fitting multimodal lognormal size distributions to cascade impactor data. The method was applied to published cascade impactor measurements for ammonium and nitrate that were previously analyzed by procedures that do not assume a functional form for the size distribution...

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Bibliographic Details
Published in:Aerosol science and technology 1990-01, Vol.13 (2), p.144-150
Main Authors: Dzubay, Thomas G., Hasan, Hashima
Format: Article
Language:English
Subjects:
Chemistry
Colloidal state and disperse state
Emulsions. Microemulsions. Foams
Exact sciences and technology
General and physical chemistry
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Summary:A procedure is described for fitting multimodal lognormal size distributions to cascade impactor data. The method was applied to published cascade impactor measurements for ammonium and nitrate that were previously analyzed by procedures that do not assume a functional form for the size distribution. An evaluation of the lognormal fitting procedure by Monte Carlo simulations demonstrated that unbiased parameters and reliable estimates of their uncertainties require correct specifications of measurement precision and impactor characteristics.
ISSN:0278-6826
1521-7388
DOI:10.1080/02786829008959432