3. Results and discussion
The results of l-Gn solubility in water and mixed solvents are listed in Table 1.
Fig. 4 gives the plot of the solubility of l-Gn in these solvents at a temperature range of about 278–313 K. In all of the tables and figures, R, which represents the solvent molar ratio of the solvent mixture,
can be calculated as follows: