By Jack Cazes
This name provides a entire review of the foundations, equipment and primary theories utilized in the separation, quantification and research of person compounds and elements. It identifies fresh advances, mathematical relationships and important layout innovations for optimum method operation and regulate of chemical and chromatographic techniques.
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Additional resources for Chromatography Theory (Chromatographic Science, 88)
Bear in mind, however, that the lower concentrations of methanol were not examined where the surface area of the stationary phase was not completely covered with methanol and the Langmuir adsorption isotherm would apply; so, the method would not be appropriate for low concentrations of organic solvent. In addition, this method of measuring thermodynamic dead volume will only be valid for small molecules. Larger molecules will be partially excluded and, thus, their dead volumes will be commensurably smaller.
In which case, unless both stationary phases have exactly the same pore distribution, if separated on another column, the separation ratios may not be the same, even if the same phase system and temperature are employed. This will become more evident when the measurement of dead volume is discussed and the importance of pore distribution is considered. To aid in solute identification, a standard substance is usually added to a mixture and the separation ratio of the solutes of interest to the standard is used for identification purposes.
W. Scott, Analyst, 114(1989)869. Copyright © 2002 by Marcel Dekker, Inc. All Rights Reserved MARCEL DEKKER, INC. 270 Madison Avenue, New York, New York 10016 12. J. J. Van Deemter, F. J. Zuiderweg and A. Klinkenberg, Chem. Eng. , 5(1956)271. 13. M. J. E. Golay, in "Gas Chromatography 1958,""(Ed. D. H. Desty), Buttenvorths, London (1958)36. Copyright © 2002 by Marcel Dekker, Inc. All Rights Reserved MARCEL DEKKER, INC. 270Madison Avenue. New York,New York 1W16 Chapter 3 The Distribution Coefficient and Its Control of Solute Retention The distribution coefficient is an equilibrium constant and, therefore, is subject to the usual thermodynamic treatment of equilibrium systems.
Chromatography Theory (Chromatographic Science, 88) by Jack Cazes