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| Ultrasonic-microwave-assisted extraction of total flavonoids from Seed oil residue of Passiflora edulis Sims |
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| DOI：10.16768/j.issn.1004-874X.2018.04.019 |
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| Abstract: |
| The seed oil residue of Passiflora edulis Sims was used as the study object，and the flavonoids in the
seed oil residue were extracted by ultrasonic-microwave-assisted methodology. First single-factor experiments were
taken，such as ethanol concentration，solid-to-solvent ratio，ultrasonic power，ultrasonic time，microwave power
and microwave time. The results showed that ultrasonic power and microwave time had a significant effect on the
extraction rate of flavonoids；ultrasonic time，ethanol concentration，solid-to-solvent ratio and microwave power had
a more significant effect on the extraction yield of flavonoids. Response surface methodology（ RSM） was applied to
optimize the extraction result and a maximum extraction yield of total flavonoids was achieved. The optimal extraction
conditions were 73.78% of ethanol concentration，1∶56.02（g/mL） of ratio between solid and liquid，300 W of
ultrasonic power，50 min of ultrasonic time，160 W of microwave power，90 s of microwave time，by which the yield
of flavonoids reached 117.53 mg/g. The extraction yield of flavonoids by ultrasonic-microwave-assisted methodology
is 14.81% higher than that of ethanol extraction. |
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