OPTIMIZING CONDITIONS FOR TOTAL PHENOLIC CONTENTS USING ULTRASOUND-ASSISTED EXTRACTION FROM CASHEW TESTA (Anacardim occidentale Linn.)

Abstract

The optimal experiments on cashew testa (Anacardim occidentale Linn.) are conducted with three factors of extraction (including liquid-solid ratio, extraction time, and extraction temperature), and the responses is total phenolic content (TPC). The result shows the highest of TPC at 375.73 mg of gallic acid equivalent/g dry weight (mg GAE/g DW) when the solvent is methanol, liquid-solid ratio at 42.6 (mL/g), extraction time at 97.8 (min), and extraction temperature at 48.5^oC. The quantitative analysis of five main components of cashew testa including catechin, epicatechin, epigallocatechin gallate (EGCG), epicatechin gallate and caffein collected from the seven regions of Vietnam is performed by HPLC. The results showed that epicatechin (44.539 mg/g DW) was the highest content, following by epicatechin gallate (13.501 mg/g DW).

DOIs: https://www.doi.org/10.46242/jstiuh.v72i6.4947