The effect of pressure on the morphology of micronized lutein
could be drawn from the sample numbers 1, 2, 3 and 5, listed in
Table 1, which were obtained at 6.5, 8, 12 and 10 MPa, respectively.
At 6.5 MPa however, no particles could be collected. It was possible
that the condition at 6.5 MPa and 50 ◦C was below the mixture
critical condition, thus CO2 did not act as an anti-solvent. Thus the
two phases coexisted in the system at this condition, in which the