Fractionared and non-fractionated high pressure extractions (F-HPE and NF-HPE, respectively) were performed using a supercritical fluid extraction apparatus previously described by Braga et al. [23]. In short, a stainless steel extraction cell (30 x 10-6 m3) was placed inside a temperature controlled water bath (Thermo Haake,Germany). Pressure was measured with a pressure liquid pumps were used to deliver the liquefied .the selection of pressure and temperature conditions was based on the previous work developed by these authors and taking into consideration already obtained pine bark extracts composition, as well as mass transfer coefficients. Table 1 reports the operational conditions of the HPE experiments performed in this study. The comminuted pine bark was always placed inside a stainless steel cylindrical 120mesh screen basket thus promoting the sovent dispersion through the raw material bed and avoiding any particle loss with the exit solvent stream. However,and in order to evaluate if this screen basket affected extraction kinetics, two extraction experiments were also performed keeping the same experimental conditions (323 K,~20 MPa,13.2x10-5 kg/s of co2) except that in one the raw material was placed directly inside the extraction cell,and in the other one the screen basket was used.