Volumetric Properties of Amino Acids in Aqueous Solutions of Glucosamine Hydrochloride at T = 293.15–313.15 K

The densities (ρ) of glycine, L-alanine, L-serine, and L-threonine solutions in 0.05, 0.10, 0.15, 0.20, and 0.30 mol kg –1 aqueous solutions of D-glucosamine hydrochloride have been measured at T = 293.15, 298.15, 303.15, 308.15, and 313.15 K. The apparent molar volumes ( V ϕ ), limiting partial molar volumes ( V_ϕ^0 ) of the amino acids have been calculated from the density data. Transfer partial molar volumes (∆ tr V_ϕ^0 ) and hydration numbers from water to the aqueous solutions of D-glucosamine hydrochloride were also obtained. These parameters of volumetric properties can help to understand the mixing effects and interactions between amino acids and D-glucosamine hydrochloride aqueous solution.