The extraction kinetics of water soluble extracts (WSE) using
the subcritical water extraction are shown in Fig. 1b. Looking at
the kinetic curves we can presume that hydrolysis of the sunflower
seed material occurs at temperatures higher than 100 C, since
yield of WSE keep increasing over longer periods of time. The highest
WSE extraction rate is obtained at 160 C, where the maximal
yield of 30.0 ± 0.8% is reached after 60 min of extraction. Comparing
the two lower temperature curves (60 C and 100 C), it can be
observed that higher yields of WSE are achieved at 60 C. This is
probably due to higher solubility of WSE at lower temperature.