Kinetic study of catechin extracted from Areca catechu seeds using green extraction method

ABSTRACT Catechin that is known for its antioxidant, antihypertension and anticancer properties can be obtained from Areca catechu. In this study, accelerated water extraction (AWE) method was used to extract catechin from A. catechu seeds. The extraction parameters tested were temperature (120, 140 and 160 °C), static time (5, 10 and 15 min) and static cycle (1, 2 and 3 cycles). A. catechu extracts were analysed using liquid chromatography time‐of‐flight mass spectrometry to quantify the amount of catechin. Highest oil yield of 390.00‐mg oil/g sample was obtained at temperature of 140 °C, 15 min of extraction time and 3 cycles. On the other hand, the highest catechin amount of 0.0716‐mg catechin/g sample was obtained at 140 °C, 10 min and 2 cycles. The effect of extraction temperature was studied using the second‐order kinetic model, and it showed good regression coefficient of more than 0.99. It suggests that the model could be applied to describe the extraction of catechin from A. catechu seeds. Based on the model, the initial extraction rate, the equilibrium extraction capacity and the extraction rate coefficient were evaluated to explain the AWE process at temperatures ranging from 120 to 160 °C. © 2014 Curtin University of Technology and John Wiley & Sons, Ltd.