食品科学 ›› 2012, Vol. 33 ›› Issue (22): 90-94.

• 工艺技术 • 上一篇    下一篇

红花龙胆花色素的提取及性质

王立志,化雪艳,刘文柱,唐克华*   

  1. 吉首大学 林产化工工程湖南省重点实验室
  • 收稿日期:2012-03-23 修回日期:2012-10-23 出版日期:2012-11-25 发布日期:2012-11-20
  • 通讯作者: 唐克华 E-mail:tkhthllh@126.com
  • 基金资助:

    湖南省高校“林产资源化学与林化产品开发”科技创新团队支持计划

Extraction and Properties of Pigments from Gentiana rhodantha Franch. ex Hemsl. Flowers

  • Received:2012-03-23 Revised:2012-10-23 Online:2012-11-25 Published:2012-11-20
  • Contact: kehua TANG E-mail:tkhthllh@126.com

摘要: 以红花龙胆花瓣为材料,对其花色素进行提取及理化性质研究。结果表明:红花龙胆花色素液在可见光区的最大吸收波长为531nm;以体积分数70%乙醇溶液提取花色素的效果较好;该花色素对紫外线、高温、VC,以及H2O2和 Na2SO3的耐受性较差,但葡萄糖、蔗糖和柠檬酸对色素溶液几乎无影响;Na+、Ca2+、A13+等金属盐离子对花色素的影响很小,但Fe2+对花色素具有显著增色作用;花色素在pH值小于等于3时保持红色色泽,但中性和碱性环境下其红色色泽被完全破坏。根据研究结果初步推断该花色素为含有酚羟基的花青素。

关键词: 红花龙胆, 花色素, 提取, 性质

Abstract: In this study, different solvents were compared for their effectiveness in extracting pigments from flower petals of Gentiana rhodantha Franch. ex Hemsl.. Seventy percent ethanol was found to be the best solvent for the extraction of pigments. The crude pigment extract had maximum absorption at 531 nm and showed a poor tolerance to UV, high temperature, VC, hydrogen peroxide and sodium sulfite. It was not almost affected by glucose, sucrose and citric acid and only slightly affected by Na+, Ca2+ and A13+, but Fe2+ caused a noticeable hyperchromic effect. The red color of the pigments was maintained at pH levels equal to or less than 3 but completely damaged in neutral or alkaline environments. Based on these results, we speculated that the pigments belong to the class of anthocyanins which contains phenolic hydroxyl groups.

Key words: Gentiana rhodantha Franch. ex Hemsl., flower pigments, extraction, properties

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