食品科学 ›› 2003, Vol. 24 ›› Issue (8): 137-139.

• 分析检测 • 上一篇    下一篇

富锌茶的锌浸出率及其饮用安全性研究

 毛清黎, 王星飞, 朱旗, 王征, 刘志刚   

  1. 孝感学院生物系,湖南农业大学食品科技学院,湖南农业大学理学院,湖南农业科学院生物技术研究中心
  • 出版日期:2003-08-15 发布日期:2011-12-13

Study on Extracting Rate of Zinc and Drinking Safety of Zn-emiched Tea

 MAO  Qing-Li, WANG  Xing-Fei, ZHU  Qi, WANG  Zheng, LIU  Zhi-Gang   

  • Online:2003-08-15 Published:2011-12-13

摘要: 本文对利用茶树的生物富集作用制得的富锌茶的锌浸出率、饮用的营养价值及安全性进行了分析研究,结果表明:富锌茶的锌浸出率为47.1%~51.1%,茶叶锌浸出率主要与加工方法等有关,而与锌含量无关;经粉碎加工的袋泡茶浸出率高于炒青。第一泡浸出的锌为两次浸泡锌总浸出量的80%左右,饮茶时一次冲泡即可获取茶叶中的大部分可浸出锌,通过饮用富锌茶可获取10%~15%的锌营养,并不会造成锌过量。利用生物转化生产富锌茶的农残及铅铜含量符合国家茶叶卫生标准。该富锌茶是一种安全有效的补锌饮料。

关键词: 富锌茶, 锌浸出率, 卫生标准, 饮用安全性

Abstract: Extracting rate of zinc, drinking nutrition and safety of Zn-enriched tea made by use of the bioenrichment of tea plantwere studied.The results showed that zinc extracting rate of the zn-enriched tea were from 47.1% to 51.1%. The extracting rateof zinc in tea was mainly depended on the tea process,but no relation with zinc content of tea.Zinc extracted from the first infusingwas 80% of total extractable zinc in twice infusing tea .People could intake zinc nutrition in 10%~15% of RDA by drinking ofthe Zn-enriched tea which would not result to excessive intake of zinc. Zn-enriched tea made by use of the bioenriching effect oftea plant accorded to the national sanitary criteron of tea and it was a good and safe drinking for supplement of zinc nutrition.

Key words: zinc-enriched tea, extracting rate of zinc, sanitary criteron, drinking safety