Results 91 to 100 of about 2,409 (147)

Anion-Exchange Displacement Centrifugal Partition Chromatography

Analytical Chemistry, 2004
Ion-exchange displacement chromatography has been adapted to centrifugal partition chromatography. The use of an ionic liquid, benzalkonium chloride, as a strong anion-exchanger has proven to be efficient for the preparative separation of phenolic acid regioisomers.
Maciuk, Alexandre, Renault, Jean-Hugues, Margraff, Rodolphe, Trébuchet, Philippe, Zeches-Hanrot, Monique, Nuzillard, Jean-Marc   +5 more
openaire   +3 more sources

Multiphase flow modeling in centrifugal partition chromatography

Journal of Chromatography A, 2011
The separation efficiency in Centrifugal Partition Chromatography (CPC) depends on selection of a suitable biphasic solvent system (distribution ratio, selectivity factor, sample solubility) and is influenced by hydrodynamics in the chambers. Especially the stationary phase retention, the interfacial area for mass transfer and the flow pattern ...
S, Adelmann, C, Schwienheer, G, Schembecker   +2 more
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Centrifugal Partition Chromatography. II. Selectivity Efficiency

Journal of Liquid Chromatography, 1988
Abstract Centrifugal Partition Chromatography (CPC) is a technique that uses two immiscible liquids. One liquid is used as a stationary phase, the second one as the mobile phase. Using the liquid systems methanol-hexane and octanol-water, the selectivity and efficiency of CPC apparatus were tested.
Alain Berthod, Daniel W. Armstrong
openaire   +1 more source

Flow regimes in centrifugal partition chromatography

AIChE Journal, 1998
AbstractModeling pressure drop, stationary‐phase holdup and separation efficiency in centrifugal partition chromatography (CPC) are hampered by restricted knowledge concerning the flow behavior of the liquid‐liquid two‐phase system. A transparent column (type CPC‐LLN) was constructed to determine the flow behavior as a function of the flow rate ...
M. J. van Buel, F. E. D. van Halsema, L. A. M. van der Wielen, K. Ch. A. M. Luyben   +3 more
openaire   +1 more source

Centrifugal Partition Chromatography. I. General Features

Journal of Liquid Chromatography, 1988
Abstract Centrifugal Partition Chromatography (CPC) is a variant of countercurrent chromatography (CCC). As in CCC, two immiscible liquids are used. The first liquid is the stationary phase, the second is the mobile phase. The liquid stationary phase is held in channels engraved in several polychlorotrifluoroethylene (PCTFE) plates.
Alain Berthod, Daniel W. Armstrong
openaire   +1 more source

Pressure drop in centrifugal partition chromatography

Journal of Chromatography A, 1997
Abstract Centrifugal partition chromatography (CPC) is more and more becoming a valuable alternative for conventional preparative chromatographic processes. Pressure drop is one of the main limitations hampering optimum performance of a CPC. A model is presented for the pressure drop over a CPC column. The pressure drop consists of two contributions:
Michel J van Buel, Luuk A.M van der Wielen, Karel Ch.A.M Luyben   +2 more
openaire   +1 more source

Centrifugal Partition Chromatography. vi. Temperature Effects

Journal of Liquid Chromatography, 1988
Abstract Temperature changes induce numerous physico-chemical changes in liquids. Vapor pressure, density, refractive index, viscosity and surface tension are such temperature dependent parameters. The mutual solubilities of the stationary and mobile phase liquids are also temperature dependent.
Alain Berthod, Daniel W. Armstrong
openaire   +1 more source

Hydrodynamics of Centrifugal Partition Chromatography

1993
The hydrodynamics of Centrifugal Partition Chromatography (CPC), an interesting analytical and preparative scale separation technique, are being investigated for modelling and scale-up. The influences of input variables on hold-up and pressure drop have been measured with an analytical scale CP-chromatograph; a preliminary overview of the first results
R. Meester, M. J. van Buel, L. A. M. van der Wielen, R. Verpoorte, K. Ch. A. M. Luyben   +4 more
openaire   +1 more source

Methodology for optimally sized centrifugal partition chromatography columns

Journal of Chromatography A, 2015
Centrifugal Partition Chromatography (CPC) is a separation process based on the partitioning of solutes between two partially miscible liquid phases. There is no solid support for the stationary phase. The centrifugal acceleration is responsible for both stationary phase retention and mobile phase dispersion.
Chollet, Sébastien, Marchal, Luc, Meucci, Jérémy, Renault, Jean-Hugues, Legrand, Jack, Foucault, Alain   +5 more
openaire   +3 more sources

Enantioseparations in counter-current chromatography and centrifugal partition chromatography

Journal of Chromatography A, 2001
Examples of chiral separations in counter-current chromatography (CCC) and centrifugal partition chromatography (CPC) are not numerous, due to the difficulty of finding chiral selectors highly selective in the liquid phase as well as a combination of solvents that does not destroy the selectivity and retains the capacity to elute chiral isomers of ...
openaire   +2 more sources