JANDERA, Pavel, David KOMERS, Lukáš ANDĚL and Lubomír PROKEŠ. Fitting competitive adsorption isotherms to the distribution data in normal phase systems with binary mobile phases. Journal of Chromatography A. 1999, vol. 831, No 2, p. 131 -148. ISSN 0021-9673.
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Basic information
Original name Fitting competitive adsorption isotherms to the distribution data in normal phase systems with binary mobile phases
Authors JANDERA, Pavel (203 Czech Republic, guarantor), David KOMERS (203 Czech Republic), Lukáš ANDĚL (203 Czech Republic) and Lubomír PROKEŠ (203 Czech Republic).
Edition Journal of Chromatography A, 1999, 0021-9673.
Other information
Original language English
Type of outcome Article in a journal
Field of Study 10406 Analytical chemistry
Country of publisher Netherlands
Confidentiality degree is not subject to a state or trade secret
WWW URL
Impact factor Impact factor: 2.520
Organization unit Faculty of Arts
Keywords in English Benzophenone; coumarine; adsorption isotherms; mobile phase compositions
Tags adsorption isotherms, Benzophenone, coumarine, mobile phase compositions
Changed by Changed by: Mgr. Ing. Lubomír Prokeš, Ph.D., učo 18302. Changed: 12/7/2010 01:00.
Abstract
To investigate the effects of the solvents on the overloaded separations in normal-phase systems, the distribution isotherms of benzophenone and of coumarin as model compounds were determined between a silica gel column and binary solvents containing various concentrations of 2-propanol in n-hexane and in dichloromethane and of dichloromethane in n-heptane. The distribution data in the individual solvent systems can be formally described by the Langmuir adsorption isotherm, but the quadratic isotherm generally improves the fit to the experimental data. The validity of the equations proposed to describe the distribution data in normal-phase systems was verified by comparison of the numerically calculated and the experimental band profiles.
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