Summary
In this paper, we report and discuss the adsorption isotherms of hydro-organic mixtures and of compounds used as mobile phase in reversed phase and normal phase high performance liquid chromatography (RP-HPLC and NP-HPLC, respectively). This work is the first attempt to study the solid-liquid interface between two types of chromatographic silica surfaces and pure organic adsorbates from water and from organic eluents by HPLC. Frequently, among the dynamic techniques the method of choice for the measurement of an adsorption isotherm is frontal analysis. We suggest here the combination of the technique based on peak asymmetry calibration and peak profiles, which allows calculations directly from integration data. The group of systems studied permits the analysis of the intermolecular interactions on the silica surface. Particular attention was given to the system methanol-water and the measurement of the adsorption ofn-octanol from methanol on RP-silica was also carried out.
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Elizalde-González, M.P., Peláez-Cid, A.A. & Ramírez-López, H. HPLC study of the adsorption from solutions on two silicagels. Chromatographia 46, 183–190 (1997). https://doi.org/10.1007/BF02495331
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DOI: https://doi.org/10.1007/BF02495331