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Particle Sizing by Photon Correlation Spectroscopy. Part IV: Resolution of bimodals and comparison with other particle sizing methods
Author(s) -
Finsy Robert,
Deriemaeker Lue,
De Jaeger Nicolas,
Sneyers Rik,
Vanderdeelen Jan,
Van der Meeren Paul,
Demeyere Hugo,
StoneMasui Jeanine,
Haestier Anne,
Clauwaert Julius,
De Wispelaere Walter,
Gillioen Pascal,
Steyfkens Sabine,
Geladé Erik
Publication year - 1993
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.19930100304
Subject(s) - sizing , cumulant , spectroscopy , photon , scattering , particle (ecology) , polarization (electrochemistry) , materials science , computational physics , optics , intensity (physics) , molecular physics , resolution (logic) , analytical chemistry (journal) , dynamic light scattering , physics , chemistry , mathematics , statistics , nanotechnology , computer science , nanoparticle , chromatography , quantum mechanics , oceanography , organic chemistry , artificial intelligence , geology
The practical performances of single and multi‐angle photon correlation spectroscopy (PCS) for resolving bimodal distributions of industrial poly (methyl methacrylate) samples was investigated in a comparative study by several users affiliated to academic and industrial groups and by two suppliers of commercial equipment. The results for the harmonic intensity averaged diameters obtained by cumulants analysis reported by the different laboratories are in agreement, in addition to the results for the normalized second cumulants. The uncertainty on the latter quantities is large, however. For the bimodal samples with two populations with average diameters in a ratio of about 2.5 : 1, not all users were able to resolve the distribution in its components by single‐angle PCS. Some slight improvement was obtained by multi‐angle PCS. Other indirect techniques (polarization intensity differential scattering, static light scattering data and disc photosedimentometer) appeared to be superior for resolving the bimodal distributions.