the need of higher extraction pressure in order to extract more yields. In our study it was found that at
40ºC the highest extracted yield was 2.3 g oil/100g sample at the pressure of 34.5 MPa, whereas the
lowest extracted oil yield was at 1.7g/ 100g sample at 40 ºC with pressure of 20.7 MPa. This is due to the
decrease of the CO2 density with increasing temperature at constant pressure, which leads to increase in
solute vapour and improvement in the extraction quality. This data is consistent with other studies
reported [15], which showed that increasing temperature increased the extraction yield at constant
pressure.