It is commonly considered that the increase in pressure results
in an increase in CO2 density, increasing the solvating power of the
supercritical fluid. Thus, higher pressure is responsible for quantitative
recoveries and stronger interactions between the fluid and
the matrix. It can be observed that an increase in operating pressure
from 20 to 40 MPa resulted in a steady increase in lycopene
yield in our study. The results were also consistent with those reported
by Topal et al. (2006).