Home

Citation: WANG Chuan-Jin, WEI Yun-Yang, ZHU Guang-Jun, DU Yang-Yan. Preparation of High Purity Epigallocatechin Gallate by Polyamide Packed Chromatographic Column Separation[J]. Chinese Journal of Applied Chemistry, ;2007, 24(4): 443-447. shu

Preparation of High Purity Epigallocatechin Gallate by Polyamide Packed Chromatographic Column Separation

1.
School of Chemical Engineering, Nanjing University of Science and Technology, Nanjing 210094

Corresponding author: WEI Yun-Yang,
Received Date: 10 May 2006
Available Online: 8 September 2006

Polyphenols were obtained from green tea by soaking it with ethanol,followed by concentration,decolorization and extraction with ethyl acetate.High purity(-)-EGCG was then obtained by polyamide packed chromatographic column separation.Orthogonal design of experiment was used to determine the optimal amount of alcohol,extraction times and particle diameter of green tea to maximize the extraction yield of(-)-EGCG.The optimal conditions were determined as follows.Twelve mL of 95% alcohol were used to extract 1 g of green tea with particle size less than 0.960 mm for 1 hour and the extraction was repeated 3 times.The decolorization of the ethanol extract of green tea with active carbon was studied.Optimal results of decolorization were obtained by using 0.36 g of activated carbon to decolor 1 g of green tea for 30 min and the decolorization was repeated 2 times.The polyamide chromatography separation conditions of crude polyphenol were investigated.The influence of particle size and amount of polyamide used on extraction yield of(-)-EGCG were studied.It was found that best separation results were obtained if 50 g of polyamide with particle size of 0.170~0.210 mm were used for 1 g extraction of green tea.0.04 g of(-)-EGCG with over 99.0% purity was obtained from 1 g of green tea through optimized process of ethanol extraction,discolo-rization and separation.The extraction yield of(-)-EGCG was 50%.The structure of the final product separated was identified by LC-MS,elemental analysis,UV,IR,HPLC and NMR.It was experimentally demonstrated that the proposed process is a safe,mild,low cost and waste free procedure.
- (-)-EGCG,
- polyamide,
- HPLC,
- extraction process,
- orthogonal design of experiment,
- activated carbon
1. [1]
  Jingming Li , Bowen Ding , Nan Li , Nurgul . Application of Comparative Teaching Method in Experimental Project Design of Instrumental Analysis Course: A Case Study in Chromatography Experiment Teaching. University Chemistry, 2024, 39(8): 263-269. doi: 10.3866/PKU.DXHX202312078
2. [2]
  Qiqi Li , Su Zhang , Yuting Jiang , Linna Zhu , Nannan Guo , Jing Zhang , Yutong Li , Tong Wei , Zhuangjun Fan . 前驱体机械压实制备高密度活性炭及其致密电容储能性能. Acta Physico-Chimica Sinica, 2025, 41(3): 2406009-. doi: 10.3866/PKU.WHXB202406009
3. [3]
  Jianjun LI , Mingjie REN , Lili ZHANG , Lingling ZENG , Huiling WANG , Xiangwu MENG . UV-assisted degradation of tetracycline hydrochloride by MnFe₂O₄@activated carbon activated persulfate. Chinese Journal of Inorganic Chemistry, 2024, 40(10): 1869-1880. doi: 10.11862/CJIC.20240187
4. [4]
  Runjie Li , Hang Liu , Xisheng Wang , Wanqun Zhang , Wanqun Hu , Kaiping Yang , Qiang Zhou , Si Liu , Pingping Zhu , Wei Shao . 氨基酸的衍生及手性气相色谱分离创新实验. University Chemistry, 2025, 40(6): 286-295. doi: 10.12461/PKU.DXHX202407059
5. [5]
  Guanghui SUI , Yanyan CHENG . Application of rice husk-based activated carbon-loaded MgO composite for symmetric supercapacitors. Chinese Journal of Inorganic Chemistry, 2025, 41(3): 521-530. doi: 10.11862/CJIC.20240221
6. [6]
  Yanhui Zhong , Ran Wang , Zian Lin . Analysis of Halogenated Quinone Compounds in Environmental Water by Dispersive Solid-Phase Extraction with Liquid Chromatography-Triple Quadrupole Mass Spectrometry. University Chemistry, 2024, 39(11): 296-303. doi: 10.12461/PKU.DXHX202402017
7. [7]
  Zunxiang Zeng , Yuling Hu , Yufei Hu , Hua Xiao . Analysis of Plant Essential Oils by Supercritical CO₂Extraction with Gas Chromatography-Mass Spectrometry: An Instrumental Analysis Comprehensive Experiment Teaching Reform. University Chemistry, 2024, 39(3): 274-282. doi: 10.3866/PKU.DXHX202309069
8. [8]
  Ping Song , Nan Zhang , Jie Wang , Rui Yan , Zhiqiang Wang , Yingxue Jin . Experimental Teaching Design on Synthesis and Antitumor Activity Study of Cu-Pyropheophorbide-a Methyl Ester. University Chemistry, 2024, 39(6): 278-286. doi: 10.3866/PKU.DXHX202310087
9. [9]
  Dong-Bing Cheng , Junxin Duan , Haiyu Gao . Experimental Teaching Design on Chitosan Extraction and Preparation of Antibacterial Gel. University Chemistry, 2024, 39(2): 330-339. doi: 10.3866/PKU.DXHX202308053
10. [10]
  Tongyu Zheng , Teng Li , Xiaoyu Han , Yupei Chai , Kexin Zhao , Quan Liu , Xiaohui Ji . A DIY pH Detection Agent Using Persimmon Extract for Acid-Base Discoloration Popularization Experiment. University Chemistry, 2024, 39(5): 27-36. doi: 10.3866/PKU.DXHX202309107
11. [11]
  Caixia Lin , Ting Liu , Zhaojiang Shi , Hong Yan , Keyin Ye , Yaofeng Yuan . Innovative Experiment of Electrochemical Dearomative Spirocyclization of N-Acyl Sulfonamides. University Chemistry, 2025, 40(4): 359-366. doi: 10.12461/PKU.DXHX202406107
12. [12]
  Bingliang Li , Yuying Han , Dianyang Li , Dandan Liu , Wenbin Shang . One-Step Synthesis of Benorilate Guided by Green Chemistry Principles and in vivo Dynamic Evaluation. University Chemistry, 2024, 39(6): 342-349. doi: 10.3866/PKU.DXHX202311070
13. [13]
  Meijin Li , Xirong Fu , Xue Zheng , Yuhan Liu , Bao Li . The Marvel of NAD⁺: Nicotinamide Adenine Dinucleotide. University Chemistry, 2024, 39(9): 35-39. doi: 10.12461/PKU.DXHX202401027
14. [14]
  Tao Yang , Kaijiao Duan , Siyu Li , Jing Wei , Qingdi Yang , Qian Wang . A Comprehensive and Innovative Chemical Experimental Teaching: Extraction and Identification of Tea Polyphenols from Pu'er Tea and the Application in Hand Cream Making. University Chemistry, 2024, 39(8): 270-275. doi: 10.3866/PKU.DXHX202312040
15. [15]
  Wanqun Hu , Pingping Zhu , Yuan Zheng , Wanqun Zhang , Wei Shao , Hong Wu , Qiang Zhou , Kaiping Yang , Xiang Sheng . Design and Practice of Ideological and Political Case Study in Instrumental Analysis Experiment Course: the Extraction and Structural Identification of Artemisinin. University Chemistry, 2024, 39(2): 203-207. doi: 10.3866/PKU.DXHX202310062
16. [16]
  Shui Hu , Houjin Li , Zhenming Zang , Lianyun Li , Rong Lai . Integration of Science and Education Promotes the Construction of Undergraduate-to-Master’s Integration Experimental Courses: A Case Study on the Extraction, Separation and Identification of Artemisinin from Artemisia annua. University Chemistry, 2024, 39(4): 314-321. doi: 10.3866/PKU.DXHX202310063
17. [17]
  Mingyang Men , Jinghua Wu , Gaozhan Liu , Jing Zhang , Nini Zhang , Xiayin Yao . 液相法制备硫化物固体电解质及其在全固态锂电池中的应用. Acta Physico-Chimica Sinica, 2025, 41(1): 2309019-. doi: 10.3866/PKU.WHXB202309019
18. [18]
  Tao Cao , Fang Fang , Nianguang Li , Yinan Zhang , Qichen Zhan . Green Synthesis of p-Hydroxybenzonitrile Catalyzed by Spinach Extracts under Red-Light Irradiation: Research and Exploration of Innovative Experiments for Pharmacy Undergraduates. University Chemistry, 2024, 39(5): 63-69. doi: 10.3866/PKU.DXHX202309098
19. [19]
  Huicheng Yang , Qianhong Sun . Practice of Ideological and Political Education in Organic Chemistry Laboratory Courses under the OBE Framework: A Case Study of Berberine Extraction. University Chemistry, 2025, 40(5): 276-282. doi: 10.12461/PKU.DXHX202410091
20. [20]
  Houjin Li , Lin Wu , Xingwen Sun , Yuan Zheng , Zhanxiang Liu , Shuanglian Cai , Ying Xiong , Guangao Yu , Qingwen Liu , Jie Han , Xin Du , Chengshan Yuan , Qihan Zhang , Jianrong Zhang , Shuyong Zhang . Basic Operations and Specification Suggestions for Organic Chemical Chromatography Experiments. University Chemistry, 2025, 40(5): 93-105. doi: 10.12461/PKU.DXHX202408100

Get Citation

PDF

XML

Metrics

PDF Downloads(1)
Abstract views(425)
HTML views(41)

通讯作者: 陈斌, bchen63@163.com

1.
沈阳化工大学材料科学与工程学院沈阳 110142

Address：Zhongguancun North First Street 2,100190 Beijing, PR China Tel: +86-010-82449177-888

DownLoad: Full-Size Img PowerPoint

Return