Table 1: Best range of parameters for Supercritical-CO2 extraction of saponin compound.
| 1. Particle size, mm | ||
| Feedstock | Particle size range, mm | Yield (weight%) |
| Monochoria vaginalis | 0.15-0.35 | 0.82 |
| Spent tea leaves | 0.15-0.35 | 0.75 |
| Furcraea selloa var. marginata | 0.15-0.35 | 0.52 |
| 2. Pressure, MPa | ||
| Feedstock | Pressure range, MPa | Yield (weight%) |
| Monochoria vaginalis | 20-25 | 0.82 |
| Spent tea leaves | 20-25 | 0.75 |
| Furcraea selloa var. marginata | 20-25 | 0.52 |
| 3. Temperature, ℃ | ||
| Feedstock | Temperature range, ℃ | Yield (weight%) |
| Monochoria vaginalis | 40-50 | 0.82 |
| Spent tea leaves | 40-50 | 0.75 |
| Furcraea selloa var. marginata | 40-50 | 0.43 |
| 4. CO2 Flowrate, ml/min | ||
| Feedstock | CO2 flow rate range, ml/min | Yield (weight%) |
| Monochoria vaginalis | 5-8 | 0.82 |
| Spent tea leaves | 5-8 | 0.75 |
| Furcraea selloa var. marginata | 5-8 | 0.52 |