Appearances of dried crude extracts were shown in Figure 1. The first extraction step of hexane gave the pale-yellow semi-solid crude. The light-brown extract was obtained from extraction with ethyl acetate and 50% ethanol and the reddish-brown extract was from acetone and 95% ethanol extraction. The last fraction of water was almost white. The yielding weight was shown in Table
Conclusion
The A. catechu L. seed extracted from different
polarity solvents showed alter phenolic content,antioxidant capacity, reducing power and characters in HPLC elution profiles. Acetone gave the highest potential for multi-residual solid-liquid microwave-assisted extraction of bioactive compounds from A. catechu L. seed. The interesting peaks which were suspected to be the catechin-like groups required further investigation to elucidate the other bioactive compounds in A. catechu L. seed.