ABSTRACT

The solubility data of L-Theanine in pure water and three kinds of water + organic solvent mxitures were measured in temperature ranges from (278.15 to 13.15) K by using an equilibrium method. The results show that the solubility of L-Theanine increases with the increasing of temperature in all selected solvents. The modified Apelblat equation and the k-h model were applied to correlate the solubility data in pure water, while the modified Apelblat equation, the k-h model, the NRTL model and the Jouyban Acree model were applied to correlate the solubility data in binary solvent mixtures. Furthermore, the mixing thermodynamic properties of L-Theanine in different solvents were also calculated based on the NRTL model and experimental solubility data.

Compounds

#	Formula	Name
1	C7H14N2O3	L-theanine
2	C3H6O	acetone
3	CH4O	methanol
4	C2H6O	ethanol
5	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	1	Normal melting temperature, K ; Crystal			Crystal Liquid Air at 1 atmosphere	DTA	1
POMD	3 1 5	Mole fraction - 1 ; Liquid	Solvent: Mole fraction - 5; Liquid Temperature, K; Liquid	Pressure, kPa; Liquid	Liquid Crystal - 1	gravimetric	64
POMD	4 1 5	Mole fraction - 1 ; Liquid	Solvent: Mole fraction - 5; Liquid Temperature, K; Liquid	Pressure, kPa; Liquid	Liquid Crystal - 1	gravimetric	48
POMD	2 1 5	Mole fraction - 1 ; Liquid	Solvent: Mole fraction - 5; Liquid Temperature, K; Liquid	Pressure, kPa; Liquid	Liquid Crystal - 1	gravimetric	48
POMD	1 5	Mole fraction - 1 ; Liquid	Temperature, K; Liquid	Pressure, kPa; Liquid	Liquid Crystal - 1	gravimetric	8

Thermodynamics Research Center / ThermoML | Journal of Chemical Thermodynamics

Thermodynamic properties of L-Theanine in different solvents

Zhou, F.[Fuli], Hou, B.[Baohong], Tao, X.[Xiaolong], Hu, X.[Xiaoxue], Huang, Q.[Qiaoyin], Zhang, Z.[Zaixiang], Wang, Y.[Yongli], Hao, H.[Hongxun]

ABSTRACT