食品科学 ›› 2005, Vol. 26 ›› Issue (7): 50-52.

• 基础研究 • 上一篇    下一篇

红茶汤动力学研究:超微粉碎工艺和温度对茶汤可溶性固形物成分萃取率的影响(英文)

 高彦祥, 杨文雄   

  1. 中国农业大学食品科学与营养工程学院
  • 出版日期:2005-07-15 发布日期:2011-09-19

Kinetics Study on Black Tea Infusion: Effects of Super-comminuting Process and Temperature on the Extraction Rate of the Soluble Solid Contents

 GAO  Yan-Xiang, YANG  Wen-Xiong   

  1. College of Food Science and Nutritional Engineering, China Agricultural University
  • Online:2005-07-15 Published:2011-09-19

摘要: 本文研究了红茶叶和超微茶粉可溶性固形物含量的萃取动力学过程。不同温度(40~80℃)下茶汤的Brixs通过数字折射计测量,实验结果通过一级稳态模型加以解释,等级常数由Brixs随时间的增加率决定。结果表明:茶汤可溶性固形物含量随萃取温度的升高而增加,超微茶粉的等级常数是红茶叶的1.22~2.22倍。

关键词: 超微茶粉, 可溶性固形物含量, 萃取动力学

Abstract: The kinetics of extracting the soluble solid contents from black tea leaves in super-comminuted tea powder was studied.The Brixs of infusion was measured by digital refractometer at different temperatures from 40 to 80℃.The first order rate constantwas determined from the rate of increase of the Brixs concentration in the tea infusion time and the result was interpreted by usinga steady state model. The results showed that the first order rate constant of the super-comminuted tea powder was 1.27~2.22 times as large as that of black tea leaves, and that the Brixs increased when the extraction temperature increased.

Key words: super-comminuted tea powder, soluble solid contents, kinetics of extraction