Isopiestic determination of water activity and vapour pressure for ternary (ionic liquid, 1-hexyl-4-methyl pyridinium bromide + d -fructose or sucrose + water) systems and corresponding binary ionic liquid solutions at 298.15 K

Measurement and Modeling of Solubility of Galactose in Aqueous Ionic Liquids, 1-Butyl-3-Methyl Imidazolium Bromide, 1-Hexyl-3-Methyl Imidazolium Bromide and 1-Butyl-3-Methylimidazolium Chloride at T = (298.15 And 308.15) K

“…To achieve this goal, a systematic study of thermophysical properties is required. In this work, in continuation to our previous papers, [13][14][15][16][17][18][19][20] the solubility values of galactose in aqueous ionic liquids, 1-butyl-3-methyl imidazolium bromide, [BMIm]Br, 1-hexyl-3-methyl imidazolium bromide, [HMIm]Br and 1-butyl-3-methylimidazolium chloride [BMIm]Cl have been measured at different ionic liquid mole fractions at T = (298.15 and 308.15) K using the gravimetric method. To model the experimental solubility data of galactose in water and aqueous ionic liquid solutions, models such as Wilson, 21 NRTL, 22 modified NRTL, 23 NRF-NRTL 24 and UNIQUAC 25 were used.…”

“…15 16,[40][41][42][43] were used to get ionic liquid-water interaction parameters at T = (298.15 and 308.15) K. In this work, for modeling of solubility of galactose in aqueous ionic liquid solutions, for the first time, activity coefficient models such as Wilson, 21 NRTL, 22 modified NRTL, 23 NRF-NRTL 24 and UNIQUAC 25 have been utilized. In our previous studies [14][15][16][17][18][19] , we found that the above models show good performance in modeling vapor-liquid equilibrium behavior for some (saccharide + ionic liquid + water) systems. In this work, the capability of these models has been examined for modeling the solubility of galactose in aqueous solutions containing ionic liquids 1butyl-3-methyl imidazolium bromide, [BMIm]Br, 1hexyl-3-methyl imidazolium bromide, [HMIm]Br and 1butyl-3-methylimidazolium chloride [BMIm]Cl.…”

Measurements and Correlation of Water Activity in Aqueous Solutions Containing Diphenhydramine-Hydrochloride Drug, (D+)-Galactose, (D−)-Fructose, (D+)-Lactose, and Sucrose at 298.15 K

“…(a) Drawing image for seven-leg manifold isopiestic method. (b) Experimental water activity, a m , in ternary aqueous solutions versus molality, m , for different systems at T = 298.15 K: ■, DPH-HCl + H 2 O from DPH-HCl + (D+)-galactose + H 2 O system; ◆, DPH-HCl + H 2 O from DPH-HCl + (D−)-fructose + H 2 O system; ▲, DPH-HCl + H 2 O from DPH-HCl + (D+)-lactose + H 2 O system; +, DPH-HCl + H 2 O from DPH-HCl + sucrose + H 2 O system; ×, (D+)-galactose + H 2 O; □, (D−)-fructose + H 2 O; △, (D+)-lactose + H 2 O; ○, sucrose + H 2 O; ___, (D−)-fructose + H 2 O system taken from our previous works; , red ---, (D+)-lactose + H 2 O system taken from Miracco et al work; ..., sucrose + H 2 O system taken from our previous work. , …”

“…Special attention was also paid to study the volumetric properties and viscosity of the binary and ternary aqueous solutions of galactose, fructose, lactose, and sucrose. − Miracco et al measured the water activity in a binary aqueous solution of lactose. Isopiestic determinations for ternary aqueous solutions containing 1-hexyl-4-methylpyridinium bromide, 1-hexyl-3-methyl imidazolium chloride, fructose, and sucrose have been carried out in our previous work. , …”

“…Isopiestic determinations for ternary aqueous solutions containing 1-hexyl-4-methylpyridinium bromide, 1-hexyl-3-methyl imidazolium chloride, fructose, and sucrose have been carried out in our previous work. 38,39 Close examination of the literature shows that no studies have been done (D+)-lactose, and sucrose by an improved isopiestic method at T = 298.15 K. Vapor pressure values were calculated from the water activity data. Local composition-based models of nonrandom two-liquid (NRTL), 40 NRF-NRTL, 41 mNRTL, 42 Wilson, 43 TNRF-mNRTL, 44 and modified NRTL proposed by Xu et al 45 have been applied for fitting the water activity data of ternary aqueous solutions containing drug and saccharides considered in this work.…”