Salt effects on the solubility of aromatic and dicarboxylic amino acids in water

• Experimental solubility data of amino acids in KCl and (NH 4 ) 2 SO aqueous solutions. ePC-SAFT modelling solid-liquid equilibria water + acid salt mixtures. Ion effects on the different polarity. The effect L-aspartic acid, L-glutamic L-tryptophan, L-tyrosine, seldomly found literature, was studied at 298.2 K, solutions , for concentrations up to 2.0 mol·kg -1 . In this concentration range, both salts are salting-in agents glutamic aspartic with a stronger induced by Regarding two aromatic acids, slight increase obtained low concentrations, followed salting-out effect, more pronounced than KCl. relative work were compared literature other same electrolyte establish ranking connected their structure. Finally, modeled using Perturbed-Chain Statistical Association Theory (ePC-SAFT). modeling requires parameters ions as well melting properties acids. All these from previous works. To quantitatively describe upon addition, binary interaction ( k ij between any anions determined, while cations fixed = 0.08. inorganic show very similar values chemical class (e.g. anion apolar side chains), which may be used systematically reduce number adjustable future work.