食品科学 ›› 2011, Vol. 32 ›› Issue (6 ): 247-249.doi: 10.7506/spkx1002-6630-201106057

• 分析检测 • 上一篇    下一篇

紫薯色素两种提取方法的比对研究

胡梦琳,杨甲甲,代 涛,李 晖*   

  1. 四川大学化工学院
  • 收稿日期:2010-05-18 修回日期:2011-01-28 出版日期:2011-03-25 发布日期:2011-03-03
  • 通讯作者: 李晖 E-mail:lihuilab@sina.com

Comparative Study on Two Extraction Methods for Purple Sweet Potato Pigment

HU Meng-lin,YANG Jia-jia,DAI Tao,LI Hui*   

  1. College of Chemical Engineering, Sichuan University, Chengdu 610065, China
  • Received:2010-05-18 Revised:2011-01-28 Online:2011-03-25 Published:2011-03-03
  • Contact: LI Hui E-mail:lihuilab@sina.com

摘要: 以紫薯为原料,采用微波和超声波对紫薯色素提取方法进行对比研究,正交法探讨两种方法的最佳提取条件和参数。结果表明:微波提取最佳条件为溶剂50%酸化乙醇、料液比1:10(g/mL)、辐射时间12min、温度75℃;超声波提取最佳条件为溶剂60%酸化乙醇、料液比1:30(g/mL)、超声时间30min、超声温度60℃;在两种方法的最佳条件下清除羟自由基,微波清除效率高。综合比较,微波方法更优。

关键词: 羟自由基, 紫薯色素, 微波提取, 超声波提取, 正交试验

Abstract: Purple potato was used as the raw material to extract pigment by microwave and ultrasonic methods. Both methods were compared and optimal extraction parameters of both methods were also explored. The results showed that the optimal microwave extraction conditions were using a 10-fold volume of a mixture of HCl and C2H5OH at a ratio of 50:50 as the extraction solvent to extract the raw material for 12 min at 75 ℃ in a microwave field. The optimal solvent composition for  ultrasonic extraction consisted of HCl and C2H5OH at a ratio of 40:60, and material/liquid ratio of 1:30 (g/mL), ultrasonic treatment time of 30 min and extraction temperature of 60 ℃. Microwave extraction derived purple sweet potato pigment had higher hydroxyl free radical scavenging capacity than purple sweet potato pigment obtained by ultrasonic extraction. Overall, microwave extraction is superior to ultrasonic extraction.

Key words: purple sweet potato pigment, microwave extraction, ultrasonic extraction, orthogonal array design, hydroxyl free radical

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