Please use this identifier to cite or link to this item: https://repositorio-aberto.up.pt/handle/10216/106775
Author(s): Wianiewski, L
Carla S.M. Pereira
Polakovic, M
Alírio Rodrigues
Title: Chromatographic separation of prebiotic oligosaccharides. Case study: Separation of galacto-oligosaccharides on a cation exchanger
Issue Date: 2014
Abstract: Chromatographic separation of prebiotic oligosaccharides, galacto-oligosaccharides from a typical post-reaction mixture containing unreacted substrate lactose and by-products glucose and galactose was investigated. A commercial cation-exchange resin Dowex 50WX4 was chosen as a prospective preparative-scale adsorbent and separation performance of its four ionic forms, H+, Na+, K+ and Ca2+, was tested. Since adsorption equilibrium isotherms were linear within the entire investigated range of concentrations, they were determined by pulse experiments for all saccharides present in a typical post reaction mixture including tri- and tetragalacto-oligosaccharides. From the four counter ions listed above, hydrogen offered the best selectivity and column performance. The selected H+-form of the cation exchanger was further investigated by means of frontal analysis where high ionic strength and elevated viscosity appear and can play a substantial role. Breakthrough curves were measured for monosaccharides, lactose, glucose-lactose mixture and a multicomponent commercial mixture of galacto-oligosaccharides, Vivinal® GOS. The breakthrough curves were successfully described by the dispersive plug flow model with linear driving force approximation. © 2013 Springer Science+Business Media New York.
URI: http://hdl.handle.net/10216/106775
Related Information: info:eu-repo/grantAgreement/FCT - Fundação para a Ciência e Tecnologia/Projetos Estratégicos/PEst-C/EQB/LA0020/2013/PROJECTO ESTRATÉGICO - LA 20 - 2013-2014/LA 20
Document Type: Artigo em Revista Científica Internacional
Rights: restrictedAccess
Appears in Collections:FEUP - Artigo em Revista Científica Internacional

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