不同粒径绿茶粉内含成分的溶出特性

Dissolution characteristics of compounds in tea powder with different particle sizes

中文关键词:  茶粉  粒径  内含成分  溶出规律

英文关键词:tea power  particle size  component  dissolution characteristics

中文摘要:

      目的 探讨不同粒径绿茶粉在模拟人体温条件下内含成分的溶出规律。方法 以40目(420 μm)绿茶粉为对照, 超微粉碎成74.85、34.62、20.84和15.10 μm的茶粉, 探讨不同粒径茶粉在37 ℃条件下内含成分的溶出规律, 以探明茶粉饮/食用后内含成分在体内溶出的最适粒径。结果 在37 ℃条件下, 茶粉内含成分的溶出量、溶出速率与茶粉的粒径、溶出时间相关。内含成分溶出50 min后, 15.10 μm茶粉茶多酚的溶出量显著高于420 μm茶粉, 可溶性糖、水浸出物的溶出量也显著高于其他所有粒径茶粉; 15.10 μm茶粉内含成分(除氨基酸外)的溶出速率在溶出后期也高于其他茶粉。结论 模拟体温条件下茶粉粒径为15.10 μm时最有利于其内含成分的溶出, 食用茶粉以粒径为15.10 μm茶粉最佳。

英文摘要:

      Objective To study the dissolution characteristics of the compounds in tea powder with different particle sizes. Methods Green tea powder with different particle sizes (74.85, 34.62, 20.84 and 15.10 μm) were got by ultrafine grinding tea powder (40 mesh, 420 μm), in which the dissolution of the compounds was studied at 37 ℃ in order to reveal the optimum particle size of tea power. Results The dissolution amount and dissolution rate of the compounds in tea power were related to the particle size of tea power and dissolution time at 37 ℃. After 50 min of the dissolution, the dissolution amount of tea polyphenols in 15.10 μm of tea powder was significantly higher than that in 420 μm of tea powder, and the dissolution amount of soluble sugar and water extract in 15.10 μm of tea powder was also significantly higher than that in all other particle sizes of tea powder. The dissolution rate of the compounds (except amino acid) in 15.10 μm of tea power was also higher than that in other tea powder in the late. Conclusion The best particle size of tea power is 15.10 μm for the dissolution of the compounds. It is best to eat tea power with 15.10 μm of particle size.