Optimization of gingerol extraction process trough subcritical water

Ginger (Zingiber officinale) has bioactive components such as shogaol and zingerone, which can mediate cardiac contractions as antioxidant, antiproliferative, and apoptosis. To increase the economic value, it is necessary to extract ginger active compounds through subcritical water. The superiority of hydrothermal extraction by using water is easy to get, cheap, abundant availability, high purity, non-toxic, and easy to handle. This study aims to obtain data on the mass transfer coefficient of ginger bioactive compounds such as shogaol through subcritical water. Response surface plot indicates that optimized condition extraction gave more than 6% of the gingerol concentration yield in the pressurized liquid extraction. The optimal value of the pressurized liquid water extraction of curcumin was obtained by solving the second-order polynomial regression equation. The optimal condition of the pressurized liquid water extraction of curcumin was the temperature of 110°C and extraction time of 5 hours.