| 65 °C, 15 min, L/L ratio 1:1 (HDES2) |
0.765 ± 0.007 |
the optimized conditions using the dl-menthol/acetic acid solvent (HDES2) led to superior
caffeine yield, compared to HDES1. |
| 65 °C,
15 min, L/L ratio 1:1 (HDES1) |
0.610 ± 0.010 |
the caffeine yield using dl-menthol/hexanoic acid (HDES1) was lower than with
HDES2, under identical conditions. |
| 65 °C,
15 min, L/L ratio
0.33 |
1.108 ± 0.008 |
the highest caffeine yield was achieved, but at the
cost of
significantly higher solvent usage and energy requirements for recovery. |
