提取温度、提取时间对绿茶有效成分提取的影?/p>
刘晓?/p>
(
浙江工业大学
绿色制药技术与装备教育部重点实验室
杭州
310014)
摘要?/p>
以水作溶剂,提取液中各有效成分的浓度为指标,通过单因素实验,研究
温度,浸提时间对绿茶中茶多酚、儿茶素类单体、咖啡碱、茶多糖、蛋白质提取
率的影响,为茶多酚提取工艺的产业化提供参考。实验结果表明:不同温度、不
同浸提时间下绿茶各有效成分提取率差别很大?/p>
儿茶素类化合物对温度和时间很
敏感,提取温度太高,时间太长,不仅儿茶素类化合物结构发生转变,咖啡碱?/p>
茶多糖等成分的溶出率也增大,影响茶多酚后续的分离纯化?/p>
关键词:
绿茶;有效成分;温度;时?/p>
Effect of temperature and time on extraction yield of active
constituent from green tea
ZHU Xing-yi, LIU Xiao-ping, XIE Jie, WANG Ping
?/p>
College Of Pharmaceutical Science, Zhejiang University Of Technology. Key Laboratory for Green
Pharmaceutical Technologies and Related Equipment, Ministry of Education, Hangzhou 310014, China)
Abstract:
The concentration of active constituents, extracted with water, was taken as
the
index
to
study
the
effect
of
temperature
and
time
on
the
extraction
yield
of
tea
polyphenol, catechins, caffeine, tea polysaccharide and protein in green tea by single
factor.
Results
showed
that
different
temperature
and
different
time
maked
a
great
difference
in
the
yield
of
green
tea
constituents.
When
extracted
with
high
temperature and long time, not only did the structure of catechins transform, but the
dissolution rate of caffeine and tea polysaccharide also increased, which affected the
subsequent separation and purification of tea polyphenol.
Key words:
green tea; active constituent; temperature; time
茶叶中含有多种生理活性物质,
具有很大的开发利用价值,
目前最令人关注
的是从茶叶中提取茶多酚?/p>
茶多糖和咖啡因?/p>
茶叶中多酚类物质约占茶叶干物?/p>
含量?/p>
15%-25%
,现已证明,茶多酚具有清除自由基、抗氧化、抗衰老、抗?
—————————————?/p>
收稿日期?/p>
*
通讯联系?/p>
E-mail: 584081584@qq.com
基金项目:国家自然科学基金(
21006097, 21076191, 21276237
?/p>
作者简介: