Imidazolium-based ionic liquids 1-hexyl-3-methylimidazolium hexaflorophosphate, and 1-hexyl-3-methylimidazolium tetrafloroborate were used to determine pH dependent-ionic forms of Valine and Aspartic acid in aqueous solutions. For this purpose, the partitioning behaviors of both compounds between the aqueous phase with different pH values and ionic liquid phase were investigated. The results revealed that due to having different pH-dependent ionic forms, each compound showed different partitioning behavior. Partitioning behaviors of Valine and Aspartic acid depend strongly to aqueous solution acidity and chemical structures of ionic liquids. Water content of ionic liquid phase and charge density of anionic and cationic constituents of ionic liquids are effective parameters for extraction of studied amino acids into ionic liquid phase. This study was considered as a basis for introducing a green technique to realize the real ionic species of different amphoteric compounds such as amino acids in the aqueous solutions.

基于咪唑鎓的离子液体1-己基-3-甲基咪唑鎓六氟磷酸盐和1-己基-3-甲基咪唑鎓四氟硼酸盐用于测定水溶液中缬氨酸和天冬氨酸的pH依赖离子形式。为此，研究了两种化合物在具有不同pH值的水相和离子液相之间的分配行为。结果表明，由于具有不同的pH依赖性离子形式，每种化合物均显示出不同的分配行为。缬氨酸和天冬氨酸的分配行为在很大程度上取决于水溶液的酸性和离子液体的化学结构。离子液相的水含量以及离子液体的阴离子和阳离子成分的电荷密度是将研究的氨基酸提取到离子液相中的有效参数。