2026-04-28T12:23:31Zhttps://uvadoc.uva.es/oai/request

oai:uvadoc.uva.es:10324/656232026-03-25T09:49:38Zcom_10324_1185com_10324_931com_10324_894col_10324_1346

Velho, Pedro Fernández Requejo, Patricia Gómez, Elena Macedo, Eugénia A. 2024-02-03T10:28:09Z 2024-02-03T10:28:09Z 2020 Separation and Purification Technology, 2020, vol. 252 p. 117447 1383-5866 https://uvadoc.uva.es/handle/10324/65623 10.1016/j.seppur.2020.117447 117447 Separation and Purification Technology 252 The application of new aqueous two-phase systems (ATPS) composed by a hydrophilic green solvent, ethyl lactate, and two low environmental impact salts: sodium and potassium citrate have been studied for the recovery of two flavonoids from aqueous solutions. First, to understand the phase formation process of the ATPS, binodal curves and tie-lines and their respective slopes and tie-line lengths were determined at T=298.15 K and atmospheric pressure. The degree of consistency of the tie-lines was evaluated using Othmer-Tobias and Bancroft equations. Moreover, the influence of the change of the salt cation on the phase behaviour has been assessed. Furthermore, the UNIversal QUAsiChemical (UNIQUAC) thermodynamic model was applied to describe the phase equilibria presented in this work. Furthermore, the partitioning of two flavonoids, rutin and quercetin, in these ATPS {ethyl lactate (1) + citrate salts (2) + water (3)} was measured at T = 298.15 K and atmospheric pressure. Finally, the obtained results were compared with those found in literature. eng info:eu-repo/semantics/restrictedAccess http://creativecommons.org/licenses/by-nc-nd/4.0/ Elsevier Attribution-NonCommercial-NoDerivatives 4.0 Internacional Novel ethyl lactate based ATPS for the purification of rutin and quercetin info:eu-repo/semantics/article