0162368 - UIACH-O 20020019 RIV NL eng C - Conference Paper (international conference)
Chmelík, Josef - Plocková, Jana
Field programming in gravitational field-flow fractionation.
FFF 2002. The Tenth International Symposium on Field-Flow Fractionation. Amsterdam, 2002, s. A-12.
[FFF'02. International Symposium on Field-Flow Fractionation /10./. Amsterdam (NL), 02.07.2002-05.07.2002]
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

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, which can be accomplished or by programmable pump or with channels of non-constant cross-sections. Several flow-rate gradients, three trapezoidal channels 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.** they can control the resulting force field acting on particles via changes of flow-velocity, which can be accomplished or by programmable pump or with channels of non-constant cross-sections. Several flow-rate gradients, three trapezoidal channels an
Permanent Link: http://hdl.handle.net/11104/0059686