食品科学 ›› 2012, Vol. 33 ›› Issue (16): 45-49.

• 工艺技术 • 上一篇    下一篇

枣核总黄酮的微波辅助提取工艺优化

张吉祥1,欧来良2   

  1. 1.廊坊师范学院化学与材料科学学院 2.南开大学 生物活性材料教育部重点实验室
  • 收稿日期:2011-07-06 修回日期:2012-07-10 出版日期:2012-08-25 发布日期:2012-09-07
  • 通讯作者: 张吉祥 E-mail:zhangjixiang1973@163.com
  • 基金资助:

    红枣中天然红色素和总黄酮的绿色提取研究

Optimization of Microwave-assisted Extraction of Total Flavonoids from Chinese Date Seeds

  • Received:2011-07-06 Revised:2012-07-10 Online:2012-08-25 Published:2012-09-07

摘要: 目的:采用正交试验法,优选枣核中总黄酮的微波辅助提取工艺。方法:以芦丁为对照品,采用分光光度法进行测定,以枣核黄酮提取率作为考查指标,对影响黄酮提取工艺的因素进行研究。通过单因素试验研究微波功率、提取时间、提取温度、料液比和提取溶剂乙醇体积分数对提取效果的影响。然后,利用正交试验法优化最佳提取工艺条件。结果:对枣核黄酮提取的影响程度大小顺序为料液比>提取温度>提取时间>乙醇体积分数>微波功率,正交试验结果表明最佳提取工艺参数为料液比1:60(g/mL)、提取温度60℃、乙醇体积分数50%、提取时间20min、微波功率500W。在最佳工艺条件下,枣核黄酮粗品的提取产率为10.14%,粗品中黄酮含量为7.00%。结论:采用正交试验-微波提取工艺,能显著提高枣核黄酮的提取效率,具有较好的提取效果。

关键词: 正交试验法, 微波, 提取, 枣核, 总黄酮

Abstract: Objective: Orthogonal array design was used to optimize the microwave-assisted extraction of total flavonoids from Chinese date seeds. Methods: Total flavonoids were spectrometrically determined using rutin as a reference compound. The effects of microwave power, extraction time, temperature, solid-to-solvent ratio and ethanol concentration on the extraction yield of total flavonoids were investigated by one-factor-at-a-time experiments. Subsequently, these extraction parameters were optimized by orthogonal array design. Results: Five extraction parameters were ranked in descending order of their effect on the extraction of total flavonoids as follows: solid-to-solvent ratio>extraction temperature>extraction time>ethanol concentration>microwave power. Their optimal levels were 1:60 (g/mL), 60 ℃, 20 min, 50% and 500 W, respectively. Under these conditions, the extraction yield of crude total flavonoids was 10.14%, and the total flavonoid content of the extract obtained was 7.00%. Conclusion: The extraction efficiency of total flavonoids from Chinese date seeds is remarkably increased by microwave extraction and orthogonal array optimization.

Key words: orthogonal array design, microwave extraction, Chinese date seeds, total flavonoids

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