Effect of the ionic strength of a mobile phase on the chromatographic retention and thermodynamic characteristics of the adsorption of enantiomers of α-phenylcarboxylic acids on a chiral adsorbent with grafted antibiotic eremomycin
- Авторлар: Reshetova E.1
-
Мекемелер:
- Institute of Technical Chemistry, Ural Branch
- Шығарылым: Том 91, № 1 (2017)
- Беттер: 167-174
- Бөлім: Physical Chemistry of Separation Processes. Chromatography
- URL: https://journals.rcsi.science/0036-0244/article/view/169204
- DOI: https://doi.org/10.1134/S0036024417010228
- ID: 169204
Дәйексөз келтіру
Аннотация
The effect the ionic strength of an aqueous ethanol mobile phase containing buffer salt has the on retention and thermodynamics of adsorption of optical isomers of some α-phenylcarboxylic acids on chiral adsorbent Nautilus-E with grafted antibiotic eremomycin is investigated. It is shown that ion exchange processes participate in the adsorption of enantiomers of α-phenylcarboxylic acids. It is established that electrostatic interactions contribute to the retention of enantiomers of α-phenylcarboxylic acids and affect selectivity only slightly. The dependences of retention characteristics, selectivity, and thermodynamic parameters on the concentration of the buffer salt in the eluent are determined. A statistical analysis of enthalpy–entropy compensation is performed, and the compensation effect is shown to be true. It is found that the points corresponding to the investigated adsorbates are distributed over the compensation dependence according to the spatial structural characteristics of molecules.
Негізгі сөздер
Авторлар туралы
E. Reshetova
Institute of Technical Chemistry, Ural Branch
Хат алмасуға жауапты Автор.
Email: lenire@yandex.ru
Ресей, Perm, 614013