Abstract
Response surface methodology (RSM) was used to optimize ultrasonic-assisted extraction for total polyphenols from Artocarpus altilis based on single-factor experiment. The main factors, ultrasonic time, the liquid-solid ratio, the extraction temperature, the type of addition acid of single factor experiment was surveyed; the principle of design for 2 factors (extraction time and liquid-solid ratio) 2 levels response surface methodology was applied and the response surface optimization extraction conditions were studied. The ultrasonic wave frequency of 37 kHz at 550W power, the ethanol concentration of 70o, the extracting temperature of 75oC, the extracting time of 35 minutes, and the ratio of solvent volume of 13.9:1 (Extracted 4 times) at pH 3.5 were selected as the optimum conditions, the extraction yield of polyphenols was 391.5862 mg/g (P < 0.05). Ultrasonic extraction is a good method for saving time, energy and material, and can be applied to the polyphenols extraction. This result revealed that potent of utilization low-value material to produce the polyphenol product at industrial scale.
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