New Insights into Buffer-Ionic Salt Interactions: Solubilities, Transfer Gibbs Energies, and Transfer Molar Volumes of TAPS and TAPSO from Water to Aqueous Electrolyte Solutions

Solubility and phase separation of 4-morpholinepropanesulfonic acid (MOPS), and 3-morpholino-2-hydroxypropanesulfonic acid (MOPSO) in aqueous 1,4-dioxane and ethanol solutions

“…The detailed procedure used in this work has been delineated in our earlier articles [4][5][6][7]. The uncertainty of the solubility limit is lower than ±0.8% (relative value, S B /(mol Á kg À1 )).…”

“…To our knowledge, there are no solubility data of MOPSO in water or in organic solvents. Hence, through our extended studies of the solubility of biological buffers in various solvents [4][5][6][7], we have now determined the solubility of MOPS and MOPSO by density measurements at T = 298.15 K in water, (water + 1,4-dioxane), and (water + ethanol) mixtures containing different concentration of the organic solvents at intervals of 10% (w/w) from 0% to 90% (w/w). Ethanol was chosen as a representative of amphiprotic hydrogen bond acceptor-donor (HBA-D) solvents.…”