화학공학소재연구정보센터
Journal of Chemical Thermodynamics, Vol.37, No.10, 1085-1092, 2005
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.