Process study of ultrasonic-assisted extraction of anthocyanins from black potato peels
In this paper,the anthocyanins were extracted from black potato peels as the raw material,with acidified meth-anol as the extraction solvent and ultrasonic assisted.We primary studied on the effects of single factors such as the ex-traction temperature,solid-liquid ratio,ultrasonic power,ultrasonic time and concentration of acidified methanol on the extraction rate of the anthocyanins in black potato peels,taking the extraction rate of anthocyanins as the index of investi-gation.On the basis of the single-factor study,and the optimization and combination of the orthogonal experiments the optimal process conditions for anthocyanins extraction from the black potato peels were finally determined as follows:ex-traction temperature of 55℃,solid-liquid ratio of 1∶25(g:mL),ultrasonic power of 270W,ultrasonic time of 25 min,and acidified methanol concentration of 50%.Under these conditions,the extraction rate of anthocyanins from black pota-to peels was 10.90%.The study also showed that the factors affecting the extraction rate of anthocyanins from black pota-to peels were in the following order:solid-liquid ratio>extraction temperature>acidified methanol concentration>ul-trasonic power>ultrasonic time.
Black potato peelAnthocyaninUltrasonicExtractionOrthogonal experiment
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