Effect of Channel Angle,Channel Thickness,Carrier Viscosity,and Flow-rate on Resolution of Micro-particles in Gravitational Field-flow Fractionation (GrFFF)
1.Introduction Gravitational field-flow fractionation (CrFFF) has been shown to be useful for separation and characterization of various types of micron-sized particles.It has been recognized however that GrFFF is less versatile than other members of FFF because the external field (Earths gravity) in GrFFF is relatively weak and is not tunable (constant),which makes the force acting on the particles constant.A few approaches have been suggested to control the force acting on particles.They include changing the angle between the Earths gravitational field and the longitudinal axis of the channel, and the use of carrier liquid having different densities.In the hyperlayer mode of GrFFF, the hydrodynamic lift force (HLF) also act on particles.The existence of HLF allows other means of changing the force acting on the particles in GrEFF.They include the flow rate programming,or the use of channels having non-constant cross-section.
gravitational field-flow fractionation channel angle (hydrozypropyl) methyl cellulose (HPMC) carder viscosity micron-sized polystyrene particles
Miri Park Da Young Kang Josef Chmelik Seungho Lee
Department of Chemistry,Hannam University,Daejeon,305-811,Korea Institute of Analytical Chemistry,Academy of Sciences of the Czech Republic,61142 Brno Czech Republi
国际会议
江苏镇江
英文
350-351
2008-10-15（万方平台首次上网日期，不代表论文的发表时间）