Results 141 to 150 of about 786,883 (190)
Journal of Chromatography A, 1997 International audienceThe coupling of centrifugal partition chromatography to NMR spectroscopy as detection and analysis method is investigated. Separation of a test mixture of three N-2,4-dinitrophenyl amino acids was performed in pH-zone-refining ...
Jean-Marc Nuzillard +2 more
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Anion-Exchange Displacement Centrifugal Partition Chromatography
Analytical Chemistry, 2004Ion-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 +5 more
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Multiphase flow modeling in centrifugal partition chromatography
Journal of Chromatography A, 2011The 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 +2 more
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Flow regimes in centrifugal partition chromatography
AIChE Journal, 1998AbstractModeling 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 +3 more
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Pressure drop in centrifugal partition chromatography
Journal of Chromatography A, 1997Abstract 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 +2 more
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Hydrodynamics of Centrifugal Partition Chromatography
1993The 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 +4 more
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Separation of a binary mixture by sequential centrifugal partition chromatography
Journal of Chromatography A, 2012Sequential centrifugal partition chromatography (sCPC) is a novel continuous cyclic liquid-liquid chromatographic separation technology. Each cycle of the process comprises two steps, which differ by the liquid phase used as mobile phase (upper or lower phase) and its flow direction.
Elisabeth, Hopmann, Mirjana, Minceva
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Methodology for optimally sized centrifugal partition chromatography columns
Journal of Chromatography A, 2015Centrifugal 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 +5 more
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Theory and Use of Centrifugal Partition Chromatography
Journal of Liquid Chromatography, 1988Abstract 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 seveal polychlorotrifluoroethylene (PCTFE) plates. One hundred channels
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Modelling gradient elution in centrifugal partition chromatography
Journal of Chromatography A, 1997Varying the phase composition of a multi-component two-phase system during a centrifugal partition chromatography (CPC) separation leads to additional degrees of freedom to influence the separation efficiency and total separation time. Optimisation of a CPC (gradient) separation is a difficult task due to the large number of two-phase systems and the ...
Michel J van Buel +2 more
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