Study of solute–solvent interaction of some bio-active solutes prevailing in aqueous ascorbic acid solution

Abstract

The apparent molar volume (ϕV), viscosity B-coefficient, molal refraction (R) and adiabatic compressibility (ϕK) of l-Glycine, l-Alanine, and l-Valine have been determined in 0.010, 0.03, 0.05mol·dm−3 aqueous ascorbic acid solutions at 298.15K from density (ρ), viscosity (η), refractive index (nD) and speed of sound (u) respectively. The limiting apparent molar volumes (ϕV0) and experimental slopes (SV*), derived from the Masson equation, have been interpreted in terms of solute–solvent and solute–solute interactions respectively. The viscosity data were analyzed using the Jones–Dole equation and the derived parameters A and B have also been interpreted in terms of solute–solute and solute–solvent interactions respectively in the solutions. Molal refractions (R) have been calculated using the Lorentz–Lorenz equation. Limiting apparent molar adiabatic compressibilities (ϕK0) of these amino acids at infinite dilution were evaluated and discussed.