ABSTRACT

The solubility of daidzin in different organic solvents and (ethyl alcohol + water) mixed solvents was measured by high performance liquid chromatography (HPLC) analysis method from T = (283.2 to 323.2) K at atmosphere pressure. The results show that at higher temperature more daidzin dissolves, and moreover, the solubility increases with the ethyl alcohol mole fraction increase in the (ethyl alcohol + water) mixed solvents. The experimental solubility values were correlated by a simplified thermodynamic equation, kh equation and modified Apelblat equation. Based on the solubility of daidzin, the enthalpy and entropy of solution were also evaluated by van t Hoff equation. The results illustrated that the dissolution process of daidzin is endothermic and entropy driven.

Compounds

#	Formula	Name
1	C21H20O9	daidzin
2	C4H8O	tetrahydrofuran
3	C3H6O	acetone
4	CH4O	methanol
5	C4H10O	butan-1-ol
6	C2H3N	acetonitrile
7	C3H8O	propan-2-ol
8	C4H8O2	ethyl acetate
9	CHCl3	trichloromethane
10	C6H12	cyclohexane
11	C2H6O	ethanol
12	H2O	water

Datasets

The table above is generated from the ThermoML associated json file (link above). POMD and RXND refer to PureOrMixture and Reaction Datasets. The compound numbers are included in properties, variables, and phases, if specificied; the numbers refer to the table of compounds on the left.
Type	Compound-#	Property	Variable	Constraint	Phase	Method	#Points
POMD	2 1	Mole fraction - 1 ; Liquid	Temperature, K; Liquid	Pressure, kPa; Liquid	Liquid Crystal - 1	Chromatography	5
POMD	3 1	Mole fraction - 1 ; Liquid	Temperature, K; Liquid	Pressure, kPa; Liquid	Liquid Crystal - 1	Chromatography	5
POMD	4 1	Mole fraction - 1 ; Liquid	Temperature, K; Liquid	Pressure, kPa; Liquid	Liquid Crystal - 1	Chromatography	5
POMD	5 1	Mole fraction - 1 ; Liquid	Temperature, K; Liquid	Pressure, kPa; Liquid	Liquid Crystal - 1	Chromatography	5
POMD	6 1	Mole fraction - 1 ; Liquid	Temperature, K; Liquid	Pressure, kPa; Liquid	Liquid Crystal - 1	Chromatography	5
POMD	7 1	Mole fraction - 1 ; Liquid	Temperature, K; Liquid	Pressure, kPa; Liquid	Liquid Crystal - 1	Chromatography	5
POMD	8 1	Mole fraction - 1 ; Liquid	Temperature, K; Liquid	Pressure, kPa; Liquid	Liquid Crystal - 1	Chromatography	5
POMD	9 1	Mole fraction - 1 ; Liquid	Temperature, K; Liquid	Pressure, kPa; Liquid	Liquid Crystal - 1	Chromatography	5
POMD	10 1	Mole fraction - 1 ; Liquid	Temperature, K; Liquid	Pressure, kPa; Liquid	Liquid Crystal - 1	Chromatography	5
POMD	11 1 12	Mole fraction - 1 ; Liquid	Temperature, K; Liquid Solvent: Mole fraction - 11; Liquid	Pressure, kPa; Liquid	Liquid Crystal - 1	Chromatography	25
POMD	1 12	Mole fraction - 1 ; Liquid	Temperature, K; Liquid	Pressure, kPa; Liquid	Liquid Crystal - 1	Chromatography	5
POMD	11 1	Mole fraction - 1 ; Liquid	Temperature, K; Liquid	Pressure, kPa; Liquid	Liquid Crystal - 1	Chromatography	5

Thermodynamics Research Center / ThermoML | Journal of Chemical Thermodynamics

Solubility of daidzin in different organic solvents and (ethyl alcohol + water) mixed solvents

Fan, J.-P.[Jie-Ping], Yang, D.[Dan], Xu, X.-K.[Xiao-Kang], Guo, X.-J.[Xiao-Jie], Zhang, X.-H.[Xue-Hong]

ABSTRACT