, obtaining the Chrastil equation points by combining CO2
densities between 400 and 800 g/L with extraction vessel temperatures
of 50, 60, and 70 C. For all-trans-lycopene, constant k, a, and b
values were calculated as 8.06, 4336.06, and 47.63, respectively.
The differences of the constants k, a, and b obtained may be caused
by the differences of the extraction system used. In this work, the
tomato seed oil was used to enhance the extraction rate, and as
the result higher concentration or solubility of lycopene in SCCO2
was obtained. In addition, the measurement of lycopene solubility
is possibly affected by factors such as the experimental method,
sampling method, method of quantification, method of measurement
of solubility, degradation of lycopene, and the degree of purity
of the starting material (Shi et al., 2009b). In comparison with