Volumetric properties of L-alanine, and L-valine in aqueous sucrose solutions at T = (288.15 and 308.15) K

Densities of L-alanine, and L-valine have been measured at T = (288.15 and 308.15) K in aqueous sucrose solutions ranging from pure water to 25 mass % of sucrose. From these densities, apparent molar volumes (V-phi) and limiting partial molar volumes (V-phi) of each amino acid in various aqueous sucrose solutions have been evaluated. These data were combined with the earlier reported V-phi degrees values of L-alanine, and L-valine in aqueous sucrose solutions at T = 298.15 K to calculate the (partial derivative V-phi degrees/partial derivative T)(P) values. The partial molar properties of transfer (Delta V-phi degrees) from water to aqueous sucrose solutions at infinite dilution has been calculated. Transfer parameters have been interpreted in terms of solute-cosolute interactions on the basis of a cosphere overlap model. Pair and triplet interaction coefficients have also been calculated from transfer volume data. (c) 2005 Elsevier Ltd. All rights reserved.