沙棘黄酮超声复合酶法提取工艺及抗氧化活性、稳定性研究Study on Extraction Process of Flavonoids from Sea Buckthorn by Ultrasonic Composite Enzyme Method and Their Antioxidant Activity and Stability
文静,赵馨馨,张琴,唐凤仙,齐倩倩,余明会
摘要(Abstract):
该研究以新疆特色大果沙棘为原料,利用超声复合酶法对沙棘黄酮进行提取,探究复合酶添加量、料液比、乙醇浓度、超声时间对沙棘黄酮提取量的影响,通过Box-Behnken响应面法优化,得到最佳沙棘黄酮提取工艺。在此基础上对沙棘黄酮的抗氧化活性和稳定性进行了研究。结果表明,沙棘黄酮最佳提取条件为料液比1∶20、复合酶添加量2.7%、乙醇浓度63%、超声时间53 min,该条件下沙棘黄酮提取量为(18.57±0.12) mg/g。当沙棘黄酮浓度为1.0 mg/mL时,其对DPPH自由基、ABTS自由基、羟基自由基的清除率分别为79.18%、77.58%、84.76%,具有较强的自由基清除能力和总还原能力。沙棘黄酮的稳定性受温度的影响较大,易受还原剂(Na_2SO_3)的影响,在pH为7的中性溶液环境中较稳定。该研究可为沙棘黄酮的开发利用提供科学理论依据。
关键词(KeyWords): 沙棘黄酮;超声提取;复合酶;抗氧化;稳定性
基金项目(Foundation): 新疆生产建设兵团NGHJG项目(2023AA503);; 第六师五家渠市科技计划项目(2315)
作者(Author): 文静,赵馨馨,张琴,唐凤仙,齐倩倩,余明会
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