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Determination of Particle Size Distribution Parameters using a Laser‐Scattered Light Spectrometer
Author(s) -
Blum Klaus,
Fissan Heinz
Publication year - 1988
Publication title -
particle and particle systems characterization
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.877
H-Index - 56
eISSN - 1521-4117
pISSN - 0934-0866
DOI - 10.1002/ppsc.19880050402
Subject(s) - particle size distribution , dispersity , particle size , optics , particle (ecology) , spectrometer , light scattering , intensity (physics) , distribution (mathematics) , refractive index , laser , distribution function , materials science , computational physics , scattering , physics , chemistry , mathematics , mathematical analysis , thermodynamics , oceanography , polymer chemistry , geology
Abstract A method based on the measurement of scattered light intensity distributions is demonstrated to be able to determine directly the particle size of monodisperse supermicron‐size particles. In all other cases of a particle cloud, information about the size distribution can be acquired from comparison of measured and calculated intensities as a function of scattering angle. This indirect method is only applicable if the assumptions made in the theory used for comparison are fulfilled. Therefore, the method is limited to spherical particles with known refractive index. The type of size distribution also has to be known. In the cases considered a log‐normal size distribution was assumed. The uncertainty of the result increases with increase in the number of parameters that have to be determined. The method seems to be limited to unimodal distributions described with two parameters.