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Photon‐migration measurement of latex size distribution in concentrated suspensions
Author(s) -
SevickMuraca Eva,
Pierce Joseph,
Jiang Huabei,
Kao Jeffrey
Publication year - 1997
Publication title -
aiche journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.958
H-Index - 167
eISSN - 1547-5905
pISSN - 0001-1541
DOI - 10.1002/aic.690430311
Subject(s) - sizing , dynamic light scattering , light scattering , particle size distribution , polystyrene , wavelength , particle size , materials science , particle (ecology) , suspension (topology) , photon , inverse , optics , analytical chemistry (journal) , scattering , physics , chemistry , chromatography , composite material , mathematics , nanotechnology , polymer , nanoparticle , oceanography , geometry , organic chemistry , geology , homotopy , pure mathematics
Frequency‐domain measurements of photon migration were conducted in concentrated polystyrene suspensions to assess their use for on‐line particle sizing in undiluted process streams. Using a numerical inverse algorithm, particle‐size distributions (PSD) and volume fractions of three latex suspensions with differing distributions were recovered from phase‐shift measurements at 15 or less visible wavelengths. Comparison to dynamic light‐scattering measurements show excellent agreement. Since it is the propagation characteristics of multiply scattered light instead of the amount of light detected that is employed to solve the inverse problem, the measurement technique provides a self‐calibrating (and therefore especially suitable) method for on‐line process monitoring of PSD in the chemical‐based industries.