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Field-flow fractionation, abbreviated FFF, [1] is a separation technique invented by J. Calvin Giddings. The technique is based on separation of colloidal or high molecular weight substances in liquid solutions, flowing through the separation platform, which does not have a stationary phase. It is similar to liquid chromatography, as it works ...
Asymmetrical flow field flow fractionation (AF4) is nowadays a common and state-of-the art method for fractionation and separation of macromolecules and particles in a suspension. AF4 is an alternative to HPLC and SEC in cases where column chromatography is not suitable for the analyte.
Eventually Prof Giddings invented the one-phase separation technique called "field-flow fractionation" (FFF). [17] [18] [19] He developed the concept of a chromatographic-like system in which retention is established and controlled by an external field rather than by the stationary phase. The FFF system extends the range of chromatography ...
Dielectrophoresis field-flow fractionation (DEP-FFF), introduced by Davis and Giddings, [42] is a family of chromatographic-like separation methods. In DEP-FFF, DEP forces are combined with drag flow to fractionate a sample of different types of particles.
Polymers can be fractionated on an analytical scale by size exclusion chromatography (SEC), Matrix-assisted laser desorption/ionization (MALDI) or field flow fractionation (FFF). These methods are used to determine the molecular weight distribution.
Sedimentation field flow fractionation (SFFF) is a non-destructive separation technique which can be used for both separation, and collecting fractions. Some ...
We generated operating cash flow of $1.2 billion and returned $1.1 billion to shareholders, including $647 million of share repurchases. I will now move to Slide 8 to cover the segment results.
Field flow fractionation; Filtration – Mesh, bag and paper filters are used to remove large particulates suspended in fluids (e.g., fly ash) while membrane processes including microfiltration, ultrafiltration, nanofiltration, reverse osmosis, dialysis (biochemistry) utilising synthetic membranes, separates micrometre-sized or smaller species