Experimental method:
Wash and slice fresh ginger, dry at 60 ℃. Weighed and crushed 10g of ginger powder with 18 mesh sieve is added to a 250mL triangular flask
Extract 100mL ethanol solution by ultrasonic oscillation and centrifuge for 15 minutes. take Determination of gingerol content and extraction rate in the supernatant.
By changing the solvent type, ethanol concentration, solid-liquid ratio, and ultrasonic waves Exploring ultrasonic technology based on extraction time, ginger pretreatment methods, etc

T he optimum extraction conditions for gingerol were identified as the follows：the particle size as60screen mesh‚60％ ethanol（V／V） as solvent‚ratio of material to liquid as1∶12．5（W／V）‚extraction time15min with only one time after drying less than60℃ of fresh ginger．T he extraction ratio of gingerol was up to

3．03％‚which was about 88．54％ that of ethanol refluence extraction for 6h．All these results indicate that ultrasonic wave extraction is a rapid method with a good selectivity and handle expediently．

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