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Determination of particle size distribution by gravitational field-flow fractionation: Dimensional characterization of silica particles
Authors:P. Reschiglian  G. Torsi
Affiliation:(1) Department of Chemistry "ldquo"G. Ciamician"rdquo", University of Bologna, Via Selmi 2, 40126 Bologna, Italy
Abstract:Summary Gravitational field-flow fractionation (GFFF) is the simplest and cheapest of field-flow fractionation (FFF) techniques, although it is still at an early development stage. The application of GFFF to the determination of particle size distribution (PSD) of silica particles used as chromatographic supports is described. The accuracy of the method is evaluated by comparing PSDs obtained by GFFF with those obtained by laser diffraction, a non-separative technique widely applied to particle characterization. It is ultimately demonstrated that a low-cost GFFF channel can simply replace the column of a standard HPLC system, allowing laboratories that are not specialized in size analysis to perform accurate PSD studies with standard HPLC expertise.
Keywords:Field-flow-fractionation  Particle size analysis  Characterization of chromatographic supports
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