Surfactant-Assisted Ultrasonic Extraction of Pectin from Pomelo Peel
Using Guanxi pomelo peel as raw material,the effects of surfactants and ultrasonic conditions on the extraction rate of pectin were studied.Response surface method was used to optimize the ultrasonic extracting technology,the combination of optimal process parameter was:liquid-solid ratio was 34.4 mL/g,pH was 1.7,ultrasonic temperature was 74.6 ℃,time was 38 min.The predicted extraction yield of pectin was 21.92%,and the actual yield was 21.37%.On this basis,compared with the synergies of surfactant TWEEN-20,polyethylene glycol(PEG)8000 and sodium dodecyl sulfate(SDS),TWEEN-20 had the best effect,and the extraction rate of pectin was 25.76%when the addition amount was 0.7%,which was 4.39%higher than that without addition.
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