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