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A simple molecular model of adsorption chromatography. XIII. Comparison of solvation effects in liquid-solid and liquid-liquid systems

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Summary

RMvs solvent composition plots of three quinoline bases are compared for analogous liquid-liquid and liquid-solid systems. For the heptane+heptanone-2-water system for which the variation of RM(log k′) values with concentration of heptanone-2 is due to solvation effects in the mobile phase, the slope of the plots was much smaller than in the case of the heptane + heptanone-2-silica system. This is considered as evidence that solvation in the mobile phase cannot play the decisive role in the adsorption equilibrium. On the other hand, the relationships can be interpreted in terms of competitive interactions of the solutes and polar solvent (heptanone-2) with the surface silanol groups, as the main molecular mechanism.

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Authors and Affiliations

  1. Department of Inorganic and Analytical Chemistry, Institute of Basic Chemical Sciences of the Medical Academy, 20-081, Lublin, Poland

    E. Soczewiński

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  1. E. Soczewiński
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Additional information

Part XII: Ref. [1].

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Soczewiński, E. A simple molecular model of adsorption chromatography. XIII. Comparison of solvation effects in liquid-solid and liquid-liquid systems. Chromatographia 11, 534–535 (1978). https://doi.org/10.1007/BF02311077

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  • DOI: https://doi.org/10.1007/BF02311077

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