Study of interactions of d(+)-glucose and d(−)-fructose with trilithium citrate in aqueous medium through volumetric and ultrasonic properties over the temperature range T = (288.15–318.15) K.

The interactions of salt trilithium citrate (TLC) with saccharides d (+)-glucose and d (−)-fructose, have been investigated in aqueous medium from density ( ρ ) and speed of sound ( c ) measurements at T = (288.15–318.15) K and experimental pressure p = 0.1 MPa. The apparent molar volume ( V ϕ ), the partial molar volume ( V ϕ o ) and standard partial molar volumes of transfer ( Δ V ϕ o ) for both saccharides, from water to aqueous trilithium citrate (TLC) have been calculated from density data. The limiting apparent molar expansibilities have also been calculated. The apparent molar isentropic compression ( K ϕ , s ), partial molar isentropic compression ( K ϕ , s o ) and partial molar isentropic compression of transfer ( Δ K ϕ , s o ) have been calculated from speed of sound results. The pair and triplet interaction coefficients have been calculated from partial molar volumes of transfer and partial molar isentropic compression of transfer. A detailed insight into the physicochemical interactions e.g. ion–hydrophilic, hydrophilic–hydrophilic and hydrophilic–hydrophobic interactions in the saccharide-salt system along with the structure-making/structure-breaking tendency of the saccharides, have been retrieved through the perusal of these calculated parameters. [ABSTRACT FROM AUTHOR]