Volumetric and 1H NMR spectroscopic studies of saccharides-calcium lactate interactions in aqueous solutions.

[Display omitted] • Hydration properties of saccharides in water and in aqueous calcium lactate solutions were studied. • The volumetric properties were evaluated from density and speed of sound data. • Hydrophobic-ionic type of interactions were concluded on the basis of volumetric and 1H NMR spectroscopic analysis. • The saccharides remain in sweet taste range also in presence of calcium lactate. The solute-solvent interactions governing the hydration behaviour of saccharide [D(+)-glucose, sucrose and D(+)lactose monohydrate) molecules were studied in aqueous solution of calcium salt at temperatures (298.15 K 313.15 K) and at atmospheric pressure. The volumetric properties were evaluated from experimentally measured densities and speed of sound data. The nature of interactions influencing the taste behaviour of saccharides in presence of calcium lactate is evaluated from apparent specific volume and apparent specific isentropic compressibility values. The volumetric transfer parameters (Δ t Z 2 ° = Δ t V 2 ° or Δ t K ° s,2) were evaluated and the magnitude of these parameters were analysed on the basis of co-sphere overlap model. Among various interactions occurring in the system, hydrophobic types of interactions were found to be the dominating one. The 1H NMR of the studied system was recorded and from the variation in chemical shift (Δδ) it was further concluded the presence of hydrophobic-ionic types of interactions. [ABSTRACT FROM AUTHOR]