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

The apparent molar volume (phi(V)). viscosity B-coefficient, molal refraction (R) and adiabatic compressibility (phi(K)) of L-Glycine, L-Alanine, and L-Valine have been determined in 0.010, 0.03, 0.05 mol.dm(-3) aqueous ascorbic acid solutions at 298.15 K from density (rho), viscosity (eta), refractive index (n(D)) and speed of sound (u) respectively. The limiting apparent molar volumes (phi(0)(V)) and experimental slopes (S-V*). 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 (phi(0)(K)) of these amino acids at infinite dilution were evaluated and discussed. (C) 2012 Elsevier B.V. All rights reserved.