Volumetric Studies of Some Amino Acids in Aqueous 1,4- Dioxane Solution at 308.15K

DOI : http://dx.doi.org/10.13005/msri/040226

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The Density measurement was carried out in aqueous solution of glycine, L-alanine, L-valine, L-Leucine and L-phenyl alanine in 10% 1,4- dioxane solution at 308.15 K. The values of apparent molar volume, limiting apparent molar volume have been evaluated from density data. These values are used for calculatating the number of water molecule hydrated (nH) to the amino acids. Transfer volumes at infinite dilution from water to aqueous 1,4- dioxane solution have been also calculated. Group contribution to partial molar volumes has been determined for the amino acids. Transfer parameter have been interpreted in terms of solute-co solute interaction on the basis of co-sphere overlap model. All these parameters are related to type and extent of intermolecular interactions in binary liquid mixtures. All the results were interpreted in the light of ion -ion and ion – solvent interactions and of structural effect of solutes in solutions.

Amino acids; transfer function; co-sphere overlap model interaction coefficients