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Separation of antibiotics by counter-current chromatography
Journal of Chromatography A, 1998This paper reviews recent applications of counter-current chromatography (CCC) to the separation of antibiotics. It also covers the recent development of CCC instruments and the optimization of the two-phase solvent system. The CCC technique offers a high resolving power when the proper solvent system is carefully selected and becomes a powerful tool ...
H, Oka, K, Harada, Y, Ito, Y, Ito
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Separation of acetins by counter‐current chromatography
Journal of Separation Science, 2011AbstractIn this work we report the purification of a crude acetin mixture into mono‐, di‐ and triacetin by countercurrent chromatography. The process was initially tested on a small, semi‐preparative scale (0.5 g) to determine its efficiency. The process was then scaled up to accommodate 2.5 g of crude reaction products containing a mixture of the ...
Bruno Amaral, Meireles +3 more
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Modeling counter-current chromatography with non-ideal injection
Journal of Chromatography A, 2020In general counter-current chromatography systems, there are several off-column fittings between injector and column inlet, such as bends, valves, connecting tubes and joints. Due to these off-column fittings, the sample will diffuse in the mobile phase and form an irregular distribution when it flows from the injector to the column inlet.
Haijun, Chen +7 more
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Controlled-cycle counter-current chromatography
Journal of Chromatography A, 2008The application of the technique of controlled-cycle operation to counter-current chromatography is suggested and evaluated. The operating cycle as applied to a chromatographic column would consist of two individually timed periods: (1) Flow period: a specified volume of mobile phase is fed into one end of the column, conveyed through it, and ...
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Recent advances in counter-current chromatography
Journal of Chromatography A, 1991During the past several years, counter-current chromatography (CCC) technology has been advanced to cover a broad spectrum of applications, from large-scale preparative to analytical-scale separations. These advances include liquid-liquid dual CCC, foam CCC and partition of macromolecules with aqueous-aqueous polymer phase systems.
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Recent Development in Counter-current Chromatography
Chinese Journal of Analytical Chemistry, 2016Abstract Counter-current chromatography (CCC) is a quick preparative separation technique with immiscible liquid-liquid solvent systems. This paper reviews recent research progress in the instruments improvement of CCC and screening of solvent systems. Moreover, some applications and prospective about chiral resolution by CCC are discussed.
Da-Tong WU, Yuan-Jiang PAN
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Journal of Chromatography A, 2007
Two well known approaches are considered to analyze the processes of counter-current and dual counter-current chromatography: the longitudinal mixing cell model and the Craig's counter-current distribution model. The cell model represents perfectly mixed, equally sized cells in series.
Artak E, Kostanyan +2 more
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Two well known approaches are considered to analyze the processes of counter-current and dual counter-current chromatography: the longitudinal mixing cell model and the Craig's counter-current distribution model. The cell model represents perfectly mixed, equally sized cells in series.
Artak E, Kostanyan +2 more
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Enantioseparations in counter-current chromatography and centrifugal partition chromatography
Journal of Chromatography A, 2001Examples 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 ...
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A novel approach to modelling counter-current chromatography
Journal of Chromatography A, 2010Literature lists a number of counter-current chromatography (CCC) models that can predict the retention time and to a certain extent the peak width of a solute eluting from a CCC column. The approach described in this paper distinguishes itself from previous reports by relating all model parameters directly to column dimensions and experimental ...
Hacer, Guzlek +3 more
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Service life of counter-current chromatography coils
Journal of Chromatography A, 2007A multilayer coil of PTFE tubing, which failed after being used each workday for about 3 years in a type J centrifuge, was examined. Two types of defects were found. One, called crazes, occurs throughout the coil and does not leak initially, but may eventually lead to a short, axially oriented slit.
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