The sweetness response and thermophysical properties of glucose and fructose in the aqueous solution of some deep eutectic solvents at T= (288.15–318.15) K

Abstract

Thermophysical properties elucidate the sweetness response, taste quality and hydration characteristics of saccharides in the aqueous solutions and offer significant information for pharmaceutical and food industries. In this current work, the effect of some neoteric green solvents as named deep eutectic solvents (DESs) on the sweetness response, taste quality and hydration behavior of the glucose and fructose solutions have been investigated from apparent specific volumes ASV, apparent specific isentropic compressibility ASIC parameters. The standard partial molar volumes Vφ0, transfer apparent molar volumes ΔtrVφ0, partial molar isentropic compressibilities Kφ0, viscosity B-coefficients and molar refractions RD the aqueous solutions of saccharides in choline chloride (ChCl)-urea, ChCl-ethylene glycol (EG), dimethyl ammonium chloride (DMAC)-ethylene glycol as DESs have been calculated from measured density, speed of sound, viscosity and refractive index data at T= (288.15–318.15) K. The results indicated that glucose in the aqueous solutions of ChCl-urea has the strongest interactions and get stronger with increasing the concentration of DES and temperature. Interaction volume Vint and cavity volume Vcav have been computed from scaled particle theory (SPT).