天然产物研究与开发 ›› 2014, Vol. 26 ›› Issue (9): 1472-1476.

• 开发研究 • 上一篇    下一篇

菊粉羧甲基化修饰及其抗氧化活性研究

范三红*,王亚云,胡雅喃,刘晓华,王相帅,田琴   

  1. 山西大学生命科学学院,太原 030006
  • 出版日期:2014-09-30 发布日期:2014-11-02

Antioxidant Activities of Inulin and Carboxymethyl Inulin

FAN San-hong*, WANG Ya-yun, HU Ya-nan, LIU Xiao-hua, WANG Xiang-shuai, TIAN Qing   

  1. College of Life Science,Shanxi University,Taiyuan 030006,China
  • Online:2014-09-30 Published:2014-11-02

摘要: 以菊粉为原料,采用溶媒法对菊粉进行羧甲基化修饰,研究了碱化时间、醚化时间、NaOH用量、溶剂体积分数四因素对羧甲基菊粉制备的影响,以取代度为指标,确定最佳修饰工艺条件。在该条件下,比较菊粉羧甲基修饰前后抗氧化活性的变化。结果表明,最佳工艺条件为碱化时间40 min、醚化时间70 min、m(菊粉):m(NaOH):m(氯乙酸)=27:4:13.8、异丙醇95%,取代度为0.682,当浓度为1mg/mL时,与修饰前菊粉相比,羧甲基菊粉清除羟自由基、DPPH、超氧阴离子自由基分别提高了12.6%、24.0%、13.9%。

关键词: 菊粉, 羧甲基化修饰, 抗氧化活性

Abstract: In this study,the carboxymethylation of inulin was investigated.The modified parameters including alkalization time,etherification time,NaOH dosage and isopropyl alcohol volume fraction were studied using orthogonal test with substitution degree as index.The optimized conditions were as follows:alkalization time 40 min,etherification time 70 min,m(Inulin):m(NaOH):m(chloracetic acid)=27:4:13.8,isopropyl alcohol volume fraction 95%.Under these conditions,a maximum substitution degree of carboxymethyl inulin of 0.628 was obtained.Compared with unmodified inulin,the scavenging activities of carboxymethyl inulin at 1 mg/mL concentration level on DPPH free radicals,hydroxyl radicals and superoxide anion increased 12.6%,24.0%,13.9% respectively.

Key words: inulin, carboxymethylation, antioxidant activity

中图分类号: 

TS218