Optimization of Ultrasound-assisted Extraction of Procyanidin from Purple Cabbage

The ultrasound-assisted extraction technology was used to study the extraction of proacyanidin from purple cabbage.Data obtained from single-factor experiment demonstrated the effect of ethanol concentration,temperature,time,material-solution ratio and the power of ultrasound on extracting efficiency.Based on this data,L16(45) orthogonal test was conducted and the best condition of purple cabbage proacyanidin ultrasound extraction(ethanol concentration 50%,material-solution ratio 1∶20,extraction temperature 50 ℃,extraction time 1.0 h,ultrasound power 540 W) was figured out.Under this condition,an extraction ratio of 104.8 mg/g was observed.