Field programming in gravitational field-flow fractionation
1.
SYSNO ASEP
0162368
Document Type
C - Proceedings Paper (int. conf.)
R&D Document Type
Conference Paper
Title
Field programming in gravitational field-flow fractionation
Author(s)
Chmelík, Josef (UIACH-O) Plocková, Jana (UIACH-O)
Source Title
FFF 2002. The Tenth International Symposium on Field-Flow Fractionation. - Amsterdam, 2002
Pages
s. a-12
Number of pages
1 s.
Action
FFF'02. International Symposium on Field-Flow Fractionation /10./
Event date
02.07.2002-05.07.2002
VEvent location
Amsterdam
Country
NL - Netherlands
Event type
WRD
Language
eng - English
Country
NL - Netherlands
Keywords
gravitational field-flow fractionation ; field programming ; hydrodynamic lift forces
Subject RIV
CB - Analytical Chemistry, Separation
R&D Projects
IAA4031805 GA AV ČR - Academy of Sciences of the Czech Republic (AV ČR)
CEZ
AV0Z4031919 - UIACH-O
Annotation
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 anwo channels of decreasing height (along the longitudinal axis) are tested as tools for optimization of the separation of a model silica gel particle mixture.
