期刊
ULTRASONICS SONOCHEMISTRY
卷 23, 期 -, 页码 360-368出版社
ELSEVIER
DOI: 10.1016/j.ultsonch.2014.10.002
关键词
Aronia melanoccnpa; Ultrasound-assisted extraction; Polyphenolics; Response surface methodology
Aronia melanocarpa by-product from filter-tea factory was used for the preparation of extracts with high content of bioactive compounds. Extraction process was accelerated using sonication. Three level, three variable face-centered cubic experimental design (FCD) with response surface methodology (RSM) was used for optimization of extraction in terms of maximized yields for total phenolics (TP), flavonoids (TF), anthocyanins (MA) and proanthocyanidins (TPA) contents. Ultrasonic power (X-1: 72-216 W), temperature (X-2: 30-70 degrees C) and extraction time (X-3: 30-90 min) were investigated as independent variables. Experimental results were fitted to a second-order polynomial model where multiple regression analysis and analysis of variance were used to determine fitness of the model and optimal conditions for investigated responses. Three-dimensional surface plots were generated from the mathematical models. The optimal conditions for ultrasound-assisted extraction of TP, TF, MA and TPA were: X-1 = 206.64W, X-2 = 70 degrees C, X-3 = 80.1 min; X-1 = 210.24 W, X-2 = 70 degrees C, X-3 = 75 min; X-1 = 216 W, X-2 = 70 degrees C, X-3 = 45.6 min and = 199.44W, X-2 = 70 degrees C, X-3 = 89.7 min, respectively. Generated model predicted values of the TP, TF, MA and TPA to be 15.41 mg GAE/ml, 9.86 mg CE/ml, 2.26 mg C3G/ml and 20.67 mg CE/ml, respectively. Experimental validation was performed and close agreement between experimental and predicted values was found (within 95% confidence interval). (C) 2014 Elsevier B.V. All rights reserved.
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