湖北农业科学 ›› 2023, Vol. 62 ›› Issue (8): 160-166.doi: 10.14088/j.cnki.issn0439-8114.2023.08.026

• 贮藏·加工 • 上一篇    下一篇

黑藜麦多糖超声辅助提取工艺及其抗氧化活性、稳定性研究

杨敏1, 奚军伟2   

  1. 1.陕西国际商贸学院,西安 712046;
    2.陕西省药品不良反应监测中心,西安 710000
  • 收稿日期:2023-02-20 出版日期:2023-08-25 发布日期:2023-09-22
  • 通讯作者: 奚军伟(1979-),男,陕西大荔人,副主任药师,主要从事中药制药及药品不良反应研究,(电话)13575571093(电子信箱)315948175@qq.com。
  • 作者简介:杨 敏(1986-),女,陕西咸阳人,实验师,主要从事中药制药及成分分析研究,(电话)18091041916(电子信箱)375477274@qq.com。
  • 基金资助:
    国家科技部重大新药创制项目(2018ZX09721-005-009-013); 陕西国际商贸学院中药质量标志物创新团队(SSY18TD02)

Study on ultrasonic-assisted extraction process, antioxidant activity and stability of polysaccharides from black quinoa

YANG Min1, XI Jun-wei2   

  1. 1. Shaanxi Institute of International Trade & Commerce,Xi’an 712046,China;
    2. Shaanxi Adverse Drug Reaction Monitoring Center, Xi’an 710000,China;
  • Received:2023-02-20 Online:2023-08-25 Published:2023-09-22

摘要: 通过响应面设计,利用超声辅助法优化黑藜麦多糖的提取工艺;通过DPPH自由基清除率、ABTS+清除率、总抗氧化能力和羟自由基清除率分别测定黑藜麦多糖的抗氧化活性;考察温度与pH对黑藜麦多糖抗氧化活性稳定性的影响。结果表明,黑藜麦多糖的提取工艺优化方案为提取时间30 min,提取温度60 ℃,料液比1∶9 g/mL,得到黑藜麦多糖的提取率为9.829 4%;通过4种方法测定多糖的抗氧化活性,表明多糖纯度越高其抗氧化性越强;黑藜麦多糖抗氧化性的稳定性受温度的影响变化显著,温度越高,加热时间越长,稳定性越低,在中性或偏酸性条件下稳定性较好。可见,黑藜麦多糖具有显著的抗氧化活性,其稳定性受温度和pH等因素的影响。

关键词: 黑藜麦, 多糖, 提取工艺, 抗氧化, 稳定性

Abstract: The Response Surface Methodology was used to optimize the extraction process of polysaccharides from black quinoa by ultrasonic-assisted extraction. The antioxidant activity of the polysaccharides from black quinoa was determined by DPPH radical scavenging rate, ABTS+ scavenging rate, total antioxidant capacity and hydroxyl radical scavenging rate. The effects of temperature and pH on the stability of the antioxidant activity of polysaccharides from black quinoa were investigated. The results showed that the optimum extraction condition of the polysaccharides from black quinoa was ultrasonic extraction time of 30 min, ultrasonic extraction temperature of 60 ℃, and solid-liquid ratio of 1∶9 g/mL. The extraction rate of polysaccharides from black quinoa was 9.829 4%. The antioxidant activity of polysaccharides was determined by four methods, it showed that the higher the purity of the polysaccharide, the stronger the antioxidant activity. The stability of the antioxidant activity of the black quinoa polysaccharide changed significantly under the influence of temperature. The higher the temperature, the longer the heating time, and the lower the stability. The antioxidative stability was better under neutral or partial acid conditions. In conclusion, the black quinoa polysaccharide had significant antioxidant activity, and its stability was affected by temperature and pH.

Key words: black quinoa, polysaccharide, extraction process, antioxidation, stability

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