0162369 - UIACH-O 20020020 RIV NL eng J - Journal Article
Plocková, Jana - Matulík, František - Chmelík, Josef
Different elution modes and field programming in gravitational field-flow fractionation IV. Field programming achieved with channels of non-constant cross-sections.
Journal of Chromatography A. Roč. 955, č. 1 (2002), s. 95-103. ISSN 0021-9673. E-ISSN 1873-3778
R&D Projects: GA AV ČR IAA4031805
Institutional research plan: CEZ:AV0Z4031919
Keywords : gravitational field-flow fractionation * field programming * hydrodynamic lift forces
Subject RIV: CB - Analytical Chemistry, Separation
Impact factor: 3.098, year: 2002

Although the Earth's gravitational field is constant and relatively weak, there are different ways to implement force field programming in GFFF. Because hydrodynamic lift forces participate in the separation process in focusing (hyperlayer) elution mode, they can control the resulting force field acting on particles via changes of flow-velocity. In this work, these changes are accomplished with channels of non-constant cross-sections. Three trapezoidal channels of decreasing breadth and two channels of decreasing height (along the longitudinal axis) are tested as tools for optimization of the separation of a model silica gel particle mixture.
Permanent Link: http://hdl.handle.net/11104/0059687