Volumetric and viscometric properties of amino acids in aqueous maltitol solutions at T = (293.15–323.15) K

The densities and viscosities of the ternary mixtures of glycine, l -alanine, l -valine, l -threonine and l -arginine in aqueous maltitol solutions were measured at T   =   (293.15–323.15)   K under the atmospheric pressure. The apparent molar volume ( V φ ), the limiting partial molar volume ( V φ 0 ) and the limiting partial molar volume of transfer (Δ tr V φ 0 ) were obtained in terms of the measured density, then the viscosity B -coefficient was further calculated by the least-square method. Meanwhile, the partial molar isobaric expansion ( E 2 0 ), the isobaric thermal expansion coefficient ( α 2 ), the solvation number ( n S ), the free energies of activation per mole of solvent (Δ μ 1 0≠ ) and per mole of solute (Δ μ 2 0≠ ) were also calculated. The volumetric and viscometric properties were analyzed and discussed according to the interactions between amino acids and maltitol molecules based on the co-sphere overlap model and the transition state theory.