Supercritical Fluid Extraction of Pyrrolidine Alkaloid from Leaves of Piper amalago L.

Figure 2

The effect of the parameters on the alkaloid yield. Cosolvent (1 = ethanol, 2 = methanol, and 3 = propyleneglycol); time (1 = 20 min, 2 = 40 min, and 3 = 60 min); temperature (1 = 40°C, 2 = 50°C, and 3 = 60°C); pressure (1 = 150 bar, 2 = 200 bar, and 3 = 250 bar). The error bar shows standard deviations for .