title: Determination of the functioning parameters in asymmetrical flow field-flow fractionation with an exponential channel.
abstract: The flow conditions in normal mode asymmetric flow field-flow fractionation are determined to approach the high retention limit with the requirement d≪l≪w, where d is the particle diameter, l the characteristic length of the sample exponential distribution and w the channel height. The optimal entrance velocity is determined from the solute characteristics, the channel geometry (exponential to rectangular) and the membrane properties, according to a model providing the velocity fields all over the cell length. In addition, a method is proposed for in situ determination of the channel height.
authors.affiliation: Institut Européen des Membranes, UMR 5635 (CNRS, UM2, ENSCM), Université Montpellier 2, 2 Place Eugène Bataillon, F-34095 Montpellier Cedex 5, France. philippe.dejardin@univ-montp2.fr
authors.forename: P
authors.initials: P
authors.lastname: Déjardin
mesh_terms: D031521:Fractionation, Field Flow; D008962:Models, Theoretical; D011312:Pressure
keywords: Determination of channel height; Exponential channel; Flow field-flow-fractionation; High retention limit; Rectangular channel