Recovery of Catechin Compound from Korean Green Tea by Solvent Extraction

초록

Catechin compounds as anticancer and antioxidant were target materials from Korean Green Tea in this work. The methodologies of solvent extraction and partition were utilized to recover catechin compounds from green tea and the optimal experimental conditions were found by comparing the degree of recovery as solvent, extraction times and operating temperatures. The extract was partitioned with chloroform, which was best fit to remove caffeine after the extraction of green tea with 80℃ water for 40 min. Further, the resulting extract was partitioned in ethyl acetate layer to purify the catechin compounds of EGC, EC, EGCG and ECG. This experimental result could be extended to preparative HPLC to obtain EGCG on a commercial scale.