Abstract: The interactions of electrolytes with saccharides are very important not only in exploring the stability of polysaccharides in biological systems but also in the chemical industry of saccharides and in the treatment of waste water containing saccharides. In this work, the density data were measured for arabinose+HCl+water at 10 K intervals from 278.15 to 318.15 K. The apparent molar volumes(V_Φ,A) and standard apparent molar volumes(V_Φ,A⁰) for arabinose in hydrochloric acids(0.2—2.1087 mol/kg) were calculated. Volumetric interaction parameters of arabinose with HCl in water were also evaluated. The apparent molar volumes and standard apparent molar volumes for arabinose in aqueous HCl solutions increase lineally with increasing molality of HCl. At a given temperature, the standard transfer apparent molar volumes(Δ_tV_Φ,A⁰) of arabinose from water to aqueous HCl solutions are positive and increase with increasing molality of HCl. In the temperature range studied, the relationship between(V_Φ,A⁰) for arabinose and temperature is as follows: V_Φ,A⁰=b₀+b₁(T-273.15)^0.84. Pair volumetric interaction parameters of arabinose with HCl in water(V_EN)are more than zero and vary slightly with the change of temperatures.

Key words: Arabinose, Hydrochloric acid, Density, Apparent molar volume, Standard partial molar isobaric expansion coefficient