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oai:uvadoc.uva.es:10324/656342026-03-25T09:46:31Zcom_10324_1185com_10324_931com_10324_894col_10324_1346

Fernández Requejo, Patricia Gómez, Elena Macedo, Eugénia A. 2024-02-03T11:37:25Z 2024-02-03T11:37:25Z 2019 Journal of Chemical & Engineering Data 2019, vol. 64, p. 4733-4740 0021-9568 https://uvadoc.uva.es/handle/10324/65634 10.1021/acs.jced.9b00052 4733 11 4740 Journal of Chemical & Engineering Data 64 1520-5134 In this work, the partitioning of four N-(2,4- dinitrophenyl)-amino acids (DNP-L-leucine, DNP-L-valine, DNP-L-alanine, and DNP-glycine) in aqueous two-phase systems (ATPS) containing a new biodegradable ionic liquid cholinium alaninate, [Ch][Ala], and the inorganic salts K3PO4 and K2HPO4 was determined at T = 298.15 K and p = 101.3 kPa. The influence of the salt on the partition coefficients was discussed. The distribution coefficients (K) of the four studied DNP-amino acids are higher in the ATPS containing the inorganic salt K3PO4. Moreover, the experimental LLE data obtained for both ATPS {[Ch][Ala] (1) + K3PO4 or K2HPO4 (2) + water (3)} (previously reported) were represented using the nonrandom two-liquid thermodynamic model. Finally, a comparison of the distribution coefficients presented in this work and those found in literature for the four studied DNP-amino acids on different ATPS was performed. eng info:eu-repo/semantics/restrictedAccess http://creativecommons.org/licenses/by-nc-nd/4.0/ American Chemical Society Attribution-NonCommercial-NoDerivatives 4.0 Internacional Partitioning of DNP-Amino Acids in New Biodegradable Choline Amino Acid/Ionic Liquid-Based Aqueous Two-Phase Systems info:eu-repo/semantics/article