Optimization of ultrasonic-microwave synergistic extraction of flavonoids from sweet potato leaves by response surface methodology

文献类型： 外文期刊

第一作者： Liu, Jiang

作者： Liu, Jiang;Mu, Taihua;Sun, Hongnan;Liu, Jiang;Mu, Taihua;Sun, Hongnan;Liu, Jiang;Fauconnier, Marie Laure

作者机构：

期刊名称：JOURNAL OF FOOD PROCESSING AND PRESERVATION （ 影响因子：2.19； 五年影响因子：2.271 ）

ISSN： 0145-8892

年卷期： 2019 年 43 卷 5 期

页码：

收录情况： SCI

摘要： Ultrasonic-microwave synergistic extraction was used to extract flavonoids from sweet potato leaves (SPL) by response surface methodology. The optimal conditions for flavonoids extraction were 1:40 (g/ml) of solid-liquid ratio, 57 degrees C of extraction temperature, 76s of extraction time, and 72% (v/v) ethanol for 2 times, the highest extraction efficiency was 91.653.37%. After purification, the flavonoids purity reached to 76.10 +/- 3.11 (%, DW). The result of high-performance liquid chromatography revealed 11 compounds including astragalin (473.8 +/- 7.3mg/g, DW), quercetrin (86.5 +/- 0.7mg/g, DW), 4,5-chlorogenic acid (76.4 +/- 0.5mg/g, DW), isoquercitrin (62.4 +/- 0.4mg/g, DW), tiliroside (18.8 +/- 0.3mg/g, DW), quercetin (12.5 +/- 0.2mg/g, DW), 3,4,5-chlorogenic acid (6.5 +/- 0.2mg/g, DW), caffeic acid (6.1 +/- 0.2mg/g, DW), kaempferol (6.0 +/- 0.2mg/g, DW), myricetrin (5.9 +/- 0.1mg/g, DW), and rhamnetin (4.3 +/- 0.1mg/g, DW) in sweet potato leaf flavonoids, which possessed good antioxidant activity compared to soy isoflavones, ginkgo biloba extract, and propolis flavone. The IC50 value of sweet potato leaf flavonoids was 13.26 +/- 0.09g/ml in ferric reducing antioxidant power and 5.41 +/- 0.21 in 2, 2-azino-bis(3-ethylbenzothiazoline-6-sulphonic acid) scavenging capacity, respectively. Practical applicationsChina is the leading country of sweet potato production in the world, but sweet potato leaves (SPL) have been neglected except for a partial use as livestock feed in most parts of China, and detailed reports on the effective components in the leaves are scarce. Ultrasonic-microwave synergistic extraction is an efficient way to select flavonoids from SPL which has a potential to be extended in natural flavonoids industry.

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