文献类型：期刊文献

英文题名：Simultaneous purification of tea polyphenols and caffeine from discarded green tea by macroporous adsorption resins

作者：Liu, Yongfeng[1,2,3];Bai, Qingqing[1,2,4];Liu, Yi[1,2,3];Di, Duolong[1,2,3,4];Guo, Mei[4];Zhao, Lei[4];Li, Jintian[4]

第一作者：Liu, Yongfeng

通信作者：Di, DL[1]

机构：[1]Chinese Acad Sci, Lanzhou Inst Chem Phys, Key Lab Chem Northwestern Plant Resources, Lanzhou 730000, Peoples R China;[2]Chinese Acad Sci, Lanzhou Inst Chem Phys, Key Lab Nat Med Gansu Prov, Lanzhou 730000, Peoples R China;[3]Chinese Acad Sci, Ctr Resource Chem & New Mat, Lanzhou Inst Chem Phys, Qingdao 266100, Peoples R China;[4]Gansu Coll Tradit Chinese Med, Key Lab Chem & Qual Tradit Chinese Med, Coll Gansu Prov, Dept Pharm, Lanzhou 730000, Peoples R China

第一机构：Chinese Acad Sci, Lanzhou Inst Chem Phys, Key Lab Chem Northwestern Plant Resources, Lanzhou 730000, Peoples R China

通信机构：[1]corresponding author), Chinese Acad Sci, Lanzhou Inst Chem Phys, Key Lab Chem Northwestern Plant Resources, Lanzhou 730000, Peoples R China.

年份：2014

卷号：238

期号：1

起止页码：59

外文期刊名：EUROPEAN FOOD RESEARCH AND TECHNOLOGY

收录：;EI(收录号：20140317204499);Scopus(收录号：2-s2.0-84891890736);WOS:【SCI-EXPANDED(收录号:WOS:000330357700007)】；

基金：This research project was financially supported by the National Natural Sciences Foundation of China (NSFC No. 20974116) and the "Hundred Talents Program" of the Chinese Academy of Sciences (CAS).

语种：英文

外文关键词：Macroporous adsorption resin; Tea polyphenols; Caffeine; Discarded green tea; Purification

摘要：To separate and purify tea polyphenols and caffeine from discarded green tea crude extract with macroporous adsorption resins (MARs), the adsorption properties of twenty kinds of MARs are systematically evaluated. The results show that GS-18 has higher separation efficiency than other MARs, and the experimental data fit best to the pseudo-second-order kinetic model. And adsorption isotherms and thermodynamics of tea polyphenols and caffeine on GS-18 are investigated. The separation parameters of tea polyphenols and caffeine from discarded green tea crude extract are optimized according to dynamic adsorption/desorption experiments with the column packed with GS-18. Through only one cycle treatment, the content of tea polyphenols increases 3.0-fold from 20 to 60 % with a recovery yield of 91 % and that of caffeine increases 3.1-fold from 7 to 22 % with a recovery yield of 98 %. The results demonstrate that the method of MARs will provide useful help for the development of large-scale separation of tea polyphenols and caffeine from discarded green tea in industry.