Solid−Liquid Equilibria in an l-Isoleucine + l-Alanine + Water System

Solid−liquid equilibria in l-isoleucine (l-Ile) + l-alanine (l-Ala) and water were measured at 293 K using the crystallization method. The l-Ile solubility decreased gradually with increased mole fraction of l-Ala. However, the l-Ala solubility was not affected by the presence of a small amount of l-Ile. Regarding the solid phase, the formation of a solid solution of l-Ile and l-Ala was confirmed when solid phases contain much l-Ile. In contrast, only l-Ala crystallized when l-Ala and a small amount of l-Ile were in the liquid phase.