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Adsorption and HPLC of carbohydrates and related hydroxy compounds on zeolites


Carbohydrates, sugar alcohols, polyols, and other hydroxy compounds were separated on a HPLC-column filled with dealuminated hydrophobic Y zeolite with water as eluent. Disaccharides show a greater retention and selectivity than monosaccharides. The selectivity for monosaccharides is in the same range compared with established stationary phases but significantly greater for disaccharides and trisaccharides. When a usual hydrophilic Y zeolite is used, either exchanged by K+ or Ca++, all disaccharides are excluded from the micropores and only monosaccharides can be separated. A hydrophobic MOR type zeolite with somewhat smaller pore geometry also excludes the disaccharides while an acceptable selectivity was observed for monosaccharides and other small hydroxyl compounds. The separation can be limited by diffusion of the solutes inside the micropores. Therefore, the separation can be improved by enhancing the temperature. The linear correlation of the dynamic separation process with the static adsorption equilibrium measured after 24 h is limited to low solute-zeolite interactions.

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Publication details

The article was received on 11 Nov 2017, accepted on 14 Feb 2018 and first published on 19 Feb 2018

Article type: Paper
DOI: 10.1039/C7AY02634J
Citation: Anal. Methods, 2018, Accepted Manuscript
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    Adsorption and HPLC of carbohydrates and related hydroxy compounds on zeolites

    W. Wach, I. Fornefett, C. Buttersack and K. Buchholz, Anal. Methods, 2018, Accepted Manuscript , DOI: 10.1039/C7AY02634J

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