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Effects of different solvents on extraction of phenolics from oil-tea meal under hot reflux and ultrasonic assistances

Vol: 32, Issue: 4, Page: 172-175
2016
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The effects of methanol, ethanol and acetone was investigated, on the extraction of phenolic contents and antioxidant activity from oil-tea meal under hot reflux and ultrasonic assistances. Under hot reflux and ultrasonic assistances, phenolic contents of acetone extracts were 1 444 ± 2 and 1 623 ± 1 mg GAE / 100 g (DW), respectively. that were significantly higher (P<0.05) than the corresponding methanol and ethanol extracts. Phenolic compounds, including catechin, epicatechin, rutin and quercetin were determinate by HPLC in these extracts. Under hot reflux and ultrasonic assistances, the ORAC values of acetone extracts were 358.4 ± 16.9 and 370.6 ± 42.1 μmol TE/ g (DW), respectively. That were significantly higher (P<0.05) than the corresponding methanol and ethanol extracts. These results show that the extraction efficiency of acetone coupled with ultrasonic is better than other methods.

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