Saturated Solubility and Thermodynamic Evaluation of l-Tryptophan in Eight Pure Solvents and Three Groups of Binary Mixed Solvents by the Gravimetric Method at T = 278.15-333.15 K Zhu, W.; Fan, Y.; Xu, Q.; Liu, X.; Heng, B.; Yang, W.; Hu, Y.; Journal of Chemical & Engineering Data 2019, 64, 4154-4168