The extraction efficiency of curcuminoids from C. longa using different solvents and extraction methodsa.
| Extraction methods | Solvents | Extraction yields (wt%, dry basis) | ||
|---|---|---|---|---|
| Bis | Dem | Cur | ||
| Stirring29 | NADES-based microemulsions [NADES (choline chloride : lactic acid)/ethanol/triacetin, 35/27.5/37.5] | 0.326 | 0.273 | 1.180 |
| Stirring30 | Surfactant-free microemulsion [triacetin/ethanol/water, 36/24/40] | 0.289 | 0.318 | 0.921 |
| Ethanol | 0.092 | 0.134 | 0.434 | |
| Soxhlet extraction31 | Methanol | 0.53 | 0.71 | 1.87 |
| Ultrasonicate-assisted extraction32 | Acetone | — | — | 4.000 |
| Ethanol | — | — | 3.285 | |
| Microwave-assisted extraction32 | Acetone | — | — | 6.857 |
| Ethanol | — | — | 4.857 | |
a
NADES, Natural Deep Eutectic Solvents.