Results 151 to 160 of about 4,761 (209)
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Enantioseparations by capillary electrochromatography
ELECTROPHORESIS, 2001The review summarizes recent developments in enantioseparations by capillary electrochromatography (CEC). Selected fundamental aspects of CEC are discussed in order to stress those features which may allow the success of this technique in the competitive field of enantioseparations. In addition, the comparative characteristics of the different modes of
Salvatore Fanali +3 more
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Overview of capillary electrophoresis and capillary electrochromatography
Journal of Chromatography A, 1999This paper provides an overview on the current status of capillary electrophoresis (CE) and capillary electrochromatography (CEC). The focus is largely on the current application areas of CE where routine methods are now in place. These application areas include the analysis of DNA, clinical and forensic samples, carbohydrates, inorganic anions and ...
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Semipreparative Capillary Electrochromatography
Analytical Chemistry, 2001Capillaries with inner diameters of 550 microm have successfully been packed with 1.5-microm octadecyl silica particles using frits made of macroporous polymers by the UV photopolymerization of a solution of glycidyl methacrylate and trimethylolpropane trimethacrylate. This type of frit is found superior to one made of low-melting point poly(styrene-co-
J R, Chen +4 more
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Fritless capillary electrochromatography
Electrophoresis, 1999The preparation of packed capillaries with stable frits of good quality can be a hurdle to obtain efficient separations in capillary electrochromatography (CEC). Especially with particles smaller than 3 microm, frit preparation is cumbersome. Highly efficient separations using packed capillaries without frits are presented.
M, Mayer, E, Rapp, C, Marck, G J, Bruin
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Instrumentation for capillary electrochromatography
Journal of Chromatography A, 2000One of the reasons for the immense interest in capillary electrochromatography (CEC) is its feature to combine chromatographic selectivity with the high efficiency and the miniaturization potential of capillary electrophoresis (CE). The capability of commercial CE instruments to run CEC has enforced the readiness of users and researchers to work on ...
F, Steiner, B, Scherer
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Applications of capillary electrochromatography
Electrophoresis, 1999Applications performed by capillary electrochromatography (CEC) in all its modes, namely packed column CEC (packed-CEC), open tubular CEC (OT-CEC) and pressure-assisted CEC (pseudo-CEC), and published by June 1999 are reviewed. The review is divided into (i) separation of neutral, acidic and basic analytes with the main goal of evaluating column and ...
A, Dermaux, P, Sandra
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Step-gradient Capillary Electrochromatography
The Analyst, 1997The analytical benefits of using a step-gradient in capillary electrochromatography (CEC) are demonstrated. The application of step-gradient CEC to the analysis of six diuretics of widely differing lipophilicities was evaluated and shown to result in a marked reduction in the analysis time and an improvement in the peak shape for later-eluting ...
Melvin R. Euerby +4 more
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Alternating Voltage Capillary Electrochromatography
Analytical Chemistry, 2003A phenomenon was found whereby the application of an alternating voltage to a capillary column can vary the capacity factor of a sample solute. The alternating voltage-induced variation in the capacity factor was studied using an anion exchange mini-bed (a short capillary column 12 mm long).
Hiroyuki, Nakagawa +3 more
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Theory of capillary electrochromatography
Journal of Chromatography A, 2001The present state of the theory of capillary electrochromatography (CEC) is reviewed. Emphasis is placed on electroosmosis and the electrical double layer, and the generally good understanding of the factors affecting the electroosmotic flow in CEC columns.
K D, Bartle, P, Myers
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Capillary Electrochromatography of Cannabinoids
Analytical Chemistry, 1998The applicability of capillary electrochromatography (CEC) with photodiode array UV detection for the analysis of cannabinoids is presented. Baseline separation of seven cannabinoids (cannabigerol, cannabidiol, cannabinol, delta-9-tetrahydrocannabinol, delta-8-tetrahydrocannabinol, cannabichromene, delta-9-tetrahydrocannabinolic acid) is obtained using
I S, Lurie, R P, Meyers, T S, Conver
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