中华医学超声杂志

应用化学 ›› 2010, Vol. 27 ›› Issue (04): 458-461.DOI: 10.3724/SP.J.1095.2010.90246

• 研究论文 • 上一篇    下一篇

高沸醇溶剂法提取胡萝卜木质素

李翔2,田玉平1,谷国团1*,滕爱丽1,陈亚琴1   

  1. (1.河南大学化学化工学院 开封 475004；2.河南城建学院化学化工系 平顶山)
  • 收稿日期:2009-04-07 修回日期:2009-08-31 出版日期:2010-04-10 发布日期:2010-04-10
  • 通讯作者: 谷国团，男，博士，副教授; E-mail:guotuangu@henu.edu.cn; 研究方向：天然功能高分子材料
  • 基金资助:
    河南大学自然科学基金重点项目（xk0502DZR007），河南省重点科技攻关计划（082102270038）

Extraction of Lignin from Carrot Root with High Boiling Solvent

LI Xiang2, TIAN Yu-Ping1, GU Guo-Tuan1*, TENG Ai-Li1, CHEN Ya-Qin1   

  1. (1.College of Chemistry and Chemical Engineering,Henan University,Kaifeng 475004;
    2.Department of chemistry and chemical engineering,Henan University of Urban Construction,Pingdingshan)
  • Received:2009-04-07 Revised:2009-08-31 Published:2010-04-10 Online:2010-04-10

PDF

1685

被引次数

10

摘要：

以乙二醇水溶液为溶剂，采用高沸醇溶剂法（high boiling solvent,HBS）从胡萝卜中提取木质素。 结果表明，将胡萝卜干粉投入到质量分数为80%的乙二醇中，在210 ℃、料液质量比为1∶6的条件下蒸煮2 h，木质素收率最高（17.79%）。 采用红外光谱（FTIR）、紫外光谱(UV)和核磁共振(1H NMR)等测试技术对其结构进行了表征。 结果表明，高沸醇法提取的胡萝卜木质素具有木质素类化合物的典型结构特征。 通过元素分析和甲氧基含量的测定，得到胡萝卜木质素的C9结构模型为C9H9.62O1.99(OCH3)0.96。 利用Fenton反应产生羟基自由基·OH，研究了胡萝卜木质素对羟基自由基的抑制效率。 结果表明，胡萝卜木质素在较低的浓度（50 mg/L）下对羟基自由基就具有较强的抑制效果，抑制率最高可达64.9%。

关键词: 高沸醇溶剂法, 乙二醇, 胡萝卜, 木质素, 抗氧化活性

Abstract:

Lignin was extracted from carrot root with high boiling solvent(HBS) 80% ethylene glycol aqueous solution as solvent. Results show that the optimum conditions were as follows:the mass ratio of raw solid materials to solvent was 1∶6, temperature was 210 ℃, reaction time was 2 h, the maximum yield was 17.79%. The chemical structure of the carrot lignin has been characterized by FTIR, UV, and 1H NMR. The chemical composition of HBS lignin from carrot root was determined by elemental analysis, and the content of methoxyl was tested with Viebock′s methods. The C9 structure of lignin from carrot was estimated as C9H9.62O1.99(OCH3)0.96. The elimination efficiency of ·OH free radical by lignin from carrot was studied. The results show that carrot lignin can inhibit the activity of ·OH free radical at low concentrations（50 mg/L）with a maximum inhibition efficiency of 64.9%.

Key words: HBS solvent, glycol, carrot, lignin, antioxidant

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