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Molecular interactions in liquid adsorption chromatography with mixed mobile phase. Solvation of the chromatographed substance in a ternary mobile phase

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Summary

The linear Jaroniec equation has been utilized for the description of chromatographic systems in which the test substance molecule is solvated by the solvent molecules. A possibility of the formation of multimolecular solvates in the bulk phase has been confirmed. The measurements were made using liquid adsorption chromatography with ternary mobile phase.

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Abbreviations

C1 :

equilibrium constant of the formation of an s−1 type bimolecular solvate

C2 :

equilibrium constant of the formation of solvates containing 1+z molecules

C *1 :

equilibrium constant corresponding to the mean energy of bonding the molecule of the most polar solvent to the test substance molecule

k ′s :

capacity factor of the chromatographed substance

Ks1 :

phase exchange equilibrium constant of the chromatographed substance

K *s1 :

equilibrium constant of phase exchange considering the existence of multimolecular solvates of the substance

L2 :

equilibrium constant of the formation of 1–1 type double associates of the most polar mobile phase component

q:

a proportionality coefficient characteristic of a given adsorbent and independent on the nature of the mobile phase

Qz :

molar fraction of 1+z molecular solvates in the mobile phase

r:

ratio of the surface area occupied by a test substance molecule to the surface area of a molecule of component 1 of the mobile phase

x1 :

total molar fraction of the most polar component of the mobile phase

x 0s :

total molar fraction of the test substance in the mobile phase

xs :

molar fraction of the test substance in the mobile phase

y1 :

molar fraction of solvent 1 in the surface phase

ys :

molar fraction of the test substance in the surface phase

z:

the number of solvent molecules in a 1+z solvate

References

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Authors and Affiliations

  1. Institute of Chemistry, Maria Curie-Sklodowska University, Pl. Marii Curie-Sklodowskiej 3, 20-031, Lublin, Poland

    B. Ościk-Mendyk

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  1. B. Ościk-Mendyk
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Ościk-Mendyk, B. Molecular interactions in liquid adsorption chromatography with mixed mobile phase. Solvation of the chromatographed substance in a ternary mobile phase. Chromatographia 28, 151–156 (1989). https://doi.org/10.1007/BF02319638

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  • DOI: https://doi.org/10.1007/BF02319638

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