Abstract: Viscosities and densities at several temperatures from 293.15 K to 313.15 K are reported
for L-ascorbic acid in aqueous glucose and sucrose solutions at different concentrations.
The parameters of density, viscosity coefficient B and partial molar volume are calculated
by regression. The experimental results show that densities and viscosities decrease as
temperature increases at the same solute and solvent (glucose and sucrose aqueous solution)
concentrations, and increase with concentration of glucose and sucrose at the same solute
concentration and temperature. B increases with concentration of glucose and sucrose and
temperature. L-ascorbic acid is structure-breaker or structure-making for the glucose and
sucrose aqueous solutions. Furthermore, the solute-solvent interactions in ternary systems
of water-glucose-electrolyte and water-sucrose-electrolyte are discussed.

Key words: L-ascorbic acid, glucose, sucrose, density, viscosity

摘要： Viscosities and densities at several temperatures from 293.15 K to 313.15 K are reported
for L-ascorbic acid in aqueous glucose and sucrose solutions at different concentrations.
The parameters of density, viscosity coefficient B and partial molar volume are calculated
by regression. The experimental results show that densities and viscosities decrease as
temperature increases at the same solute and solvent (glucose and sucrose aqueous solution)
concentrations, and increase with concentration of glucose and sucrose at the same solute
concentration and temperature. B increases with concentration of glucose and sucrose and
temperature. L-ascorbic acid is structure-breaker or structure-making for the glucose and
sucrose aqueous solutions. Furthermore, the solute-solvent interactions in ternary systems
of water-glucose-electrolyte and water-sucrose-electrolyte are discussed.

关键词: L-ascorbic acid;glucose;sucrose;density;viscosity