Volumetric Properties of Diglycine from Water to Aqueous Amino Acids solutions at 298.15 K and 310.15 K

Abstract

Densities of diglycine in aqueous solutions of L-alanine and L-serine were measured at 298.15 K and 310.15 K. The standard partial molar volume (V 0 ), standard partial molar volumes of transfer (trV 0 ) have been determined. The results show that, the 0 tr V   values of diglycine are positive and vary in the sequence L-serine>L-alanine. And the 0 tr V  increase with the increasing concentration of amino acids, but decrease with the increasing temperature. The results have been interpreted in terms of structure interaction model.