Browsing by Author "Warner, I. M."
Now showing items 1-9 of 9
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Analytical separations in open-tubular capillary electrochromatography
Kapnissi‐Christodoulou, Constantina P.; Zhu, X.; Warner, I. M. (2003)This review represents a summary of recent progress in open-tubular capillary electro-chromatography (OT-CEC) for chiral and achiral separations. The OT-CEC approach is an alternative to packed-CEC that could eliminate the ...
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Article
Analytical separations using molecular micelles in open-tubular capillary electrochromatography
Kapnissi‐Christodoulou, Constantina P.; Akbay, C.; Schlenoff, J. B.; Warner, I. M. (2002)Open-tubular capillary electrochromatography (OT-CEC) is an alternative approach to conventional CEC. The primary advantage of OT-CEC is the elimination of problems associated with frits and silica particles in conventional ...
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Article
Chiral separations using a polypeptide and polymeric dipeptide surfactant polyelectrolyte multilayer coating in open-tubular capillary electrochromatography
Kamande, M. W.; Zhu, X.; Kapnissi‐Christodoulou, Constantina P.; Warner, I. M. (2004)A polyelectrolyte multilayer (PEM) coating consisting of the polypeptide, poly(L-lysine) hydrobromide, poly(L-lysine) and the polymeric dipeptide surfactant, poly(sodium undecanoyl-L-leutcyl-alaninate), poly(L-SULA), is ...
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Chiral Separations Using Polymeric Surfactants and Polyelectrolyte Multilayers in Open-Tubular Capillary Electrochromatography
Kapnissi‐Christodoulou, Constantina P.; Valle, B. C.; Warner, I. M. (2003)In this study, fused-silica capillaries are modified using a polyelectrolyte multilayer (PEM) coating procedure in open-tubular capillary electrochromatography. The PEM coating was constructed in situ with alternating ...
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Facile preparation of polysaccharide-coated capillaries using a room temperature ionic liquid for chiral separations
Stavrou, Ioannis J.; Moore, L.; Fernand, V. E.; Kapnissi‐Christodoulou, Constantina P.; Warner, I. M. (2013)In this study, the dissolution of polysaccharides into an ionic liquid was investigated and applied as a coating onto the capillary walls of a fused-silica capillary in open-tubular CEC. The coating was evaluated by examining ...
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Investigation of the stability of polyelectrolyte multilayer coatings in open-tubular capillary electrochromatography using laser scanning confocal microscopy
Kapnissi‐Christodoulou, Constantina P.; Lowry, M.; Agbaria, R. A.; Geng, L.; Warner, I. M. (2005)A simple polyelectrolyte multilayer (PEM) coating procedure was used for the development of stable modified capillaries. PEM coatings were constructed in fused-silica capillaries using alternating rinses of cationic and ...
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Open-tubular capillary electrochromatography using a polymeric surfactant coating
Kamande, M. W.; Kapnissi‐Christodoulou, Constantina P.; Zhu, X.; Akbay, C.; Warner, I. M. (2003)A stable polyelectrolyte multilayer (PEM) coating was investigated for use in open-tubular capillary electrochromatography (o-CEC). In this approach, the PEM consisted of the cationic polymer of a quaternary ammonium salt, ...
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Open-tubular capillary electrochromatography/electrospray ionization-mass spectrometry using polymeric surfactant as a stationary phase coating
Zhu, X.; Kamande, M. W.; Thiam, S.; Kapnissi‐Christodoulou, Constantina P.; Mwongela, S. M.; Warner, I. M. (2004)We describe the use of the polymeric surfactant poly(sodium undecylenic sulfate) (poly-SUS) as a stationary phase coating in open-tubular capillary electrochromatog raphy (OT-CEC) coupled with electrospray ionization-mass ...
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Separation of benzodiazepines using capillary electrochromatography
Kapnissi‐Christodoulou, Constantina P.; Warner, I. M. (2004)Benzodiazepines are often used for the treatment of epilepsy, convulsions, and many psychiatric disorders. The widespread use of this class of drugs has occasionally raised concern about recreational benzodiazepine abuse ...