欢迎访问《茶叶科学》,今天是

茶叶科学 ›› 2005, Vol. 25 ›› Issue (1): 71-74.doi: 10.13305/j.cnki.jts.2005.01.013

• • 上一篇    下一篇

茶叶多糖铁的合成及其铁含量的测定

李玉贤1, 裴晓红2   

  1. 1. 河南中医学院中药系,河南 郑州450008;
    2. 平顶山市环境监测中心站,河南 平顶山 467000
  • 出版日期:2005-03-25 发布日期:2019-09-16
  • 作者简介:李玉贤(1963— ),女,副教授,主要从事天然产物化学研究。

Synthesis of tea polysaccharide-Fe(Ⅲ)complex and determination of Fe(Ⅲ)

LI Yu-xian1, PEI Xiao-hong2   

  1. 1. Department of Chinese Medicine, Henan College of Traditional Chinese Medicine, Zhengzhou 450008, China;
    2. Pingdingshan Environmental monitoring station, Pingdingshan 467000, China
  • Online:2005-03-25 Published:2019-09-16

摘要: 用热水浸泡法从粗老茶叶中提取茶叶多糖,在碱性条件下,茶叶多糖水溶液与三氯化铁反应合成茶叶多糖铁配合物(TPC),并用邻菲罗啉分光光度法和原子吸收光谱法测定TPC中铁(Ⅲ)的含量。实验结果表明:TPC是深棕红色无定型粉末, 易溶于水,在pH值3~12范围内不沉淀,不水解。TPC中铁(Ⅲ)的含量:邻菲罗啉分光光度法测定结果为20.71%,原子吸收光谱法测定结果为20.13%。

关键词: 茶叶多糖, 茶叶多糖铁配合物, 合成, 铁含量的测定

Abstract: Tea polysaccharide was abstracted with warm water, tea polysaccharide-Fe(Ⅲ)complex(TPC) was synthesized with tea polysaccharide and FeCl3 under the alkaline condition, The determination of Fe(Ⅲ) was conducted with the method of ferroin-Fe(Ⅱ) and atomic absorption spectrophometry. The results showed that: TPC is heavy brownish red and shapeless powder. It can dissolve in water, its solution is very stable at the pH from 3 to 12. Content of Fe(Ⅲ)in TPC is 20.71% by the method of ferroin- Fe(Ⅱ)and 20.13% by the method of atomic absorption.

Key words: Tea polysaccharide, Polysaccharide-Fe(Ⅲ)complex, Synthesis, Determination of iron

中图分类号: