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  • 1
    Electronic Resource
    Electronic Resource
    Chromatographic investigations of adsorption of some aromatic compounds on aluminium oxide and silica gel from solutions (1980)
    Springer
    Chromatographia 13 (1980), S. 109-113 
    Details
    ISSN: 1612-1112
    Keywords: Thin-layer chromatography ; Chromatographic theory ; Adsorption
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Summary Using adsorption TLC RM values were measured for a number of aromatic compounds on aluminium oxide and silica gels having different specific surface areas, using the following binary mobile phases: benzene+toluene, benzene+carbon tetrachloride and chloroform+carbon tetrachloride. The results are graphically presented and compared with theoretically calculated values. Generally, a good agreement was found between the calculated and measured RM values. The agreement is valid both when the RM values were calculated using experimentally (indirectly) determined partition coefficients or when the coefficients are obtained with help of Ościk's equation [cf. Roczn. Chem.34, 745 (1960) and Chromatographia4, 516 (1971)]. One can assume that in the case of systems in which strong intermolecular interactions are absent, the statically determined partition coefficients of the compounds may be used for the calculation of their RM values.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02263063
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  • 2
    Electronic Resource
    Electronic Resource
    Adsorption TLC with binary mobile phases (1981)
    Springer
    Chromatographia 14 (1981), S. 95-99 
    Details
    ISSN: 1612-1112
    Keywords: Thin-layer chromatography ; Adsorption ; Binary mobile phase ; Heterogeneity effects ; Chromatographic parameters
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Summary An equation describing RM values in TLC with a binary mobile phase has been derived and examined by using TLC data. Two different methods have been proposed to determine the chromatographic parameters characterizing energetic heterogeneity of the adsorption system and solute-solvent interactions. These methods differ in the estimation of the mole fractions of solvents in the surface phase. In method I an analytical equation for evaluating these mole fractions is assumeda priori. Method II utilized the excess adsorption isotherm measured for the mobile phae-adsorbent system.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02279519
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  • 3
    Electronic Resource
    Electronic Resource
    Molecular interactions in adsorption liquid chromatography with mixed mobile phase (1988)
    Springer
    Chromatographia 25 (1988), S. 300-306 
    Details
    ISSN: 1612-1112
    Keywords: Liquid adsorption chromatography ; Molecular interactions ; Type of association
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Summary The equation of Jaroniec was used to describe the molecular interactions in liquid adsorption chromatography with mixed mobile phases. The main object of the investigation was to demonstrate that the type of association in the bulk phase is independent of the nature of the stationary phase, and to examine the influence of the nature and number of components in the mobile phase upon the specific interactions in the system. The relationship between the type of association and the structure of the chromatographed substance was also taken into account.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02324704
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  • 4
    Electronic Resource
    Electronic Resource
    Thin-layer adsorption chromatography with mixed mobile phases. 3. Correlation between parameters characterizing the chromatographic systems with binary and ternary mobile phases (1980)
    Weinheim : Wiley-Blackwell
    Journal of High Resolution Chromatography 3 (1980), S. 180-182 
    Details
    ISSN: 0935-6304
    Keywords: Thin-layer chromatography, TLC ; Liquid adsorption chromatography ; TLC with binary and ternary mobile phases ; Heterogeneity effects in TLC ; TLC data for polycyclic hydrocarbons on silica gel ; Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: TLC experimental data have been measured for polycyclic hydrocarbons in binary and ternary mobile phases on silica gel. These data have been interpretated using the equation discussed by us in Part 1 of this series [HRC & CC 2 (1979) 236]. The heterogeneity parameter appearing in this equation has been evaluated and compared for different ternary and binary mobile phases.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jhrc.1240030407
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