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Journal of Tea Science ›› 2010, Vol. 30 ›› Issue (6): 423-428.doi: 10.13305/j.cnki.jts.2010.06.003

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Study on the Chemical Component of E8 Fraction from Pu-erh Tea

LU Hai-peng, LIN Zhi*, ZHONG Qiu-sheng, WANG Li   

  1. Key Laboratory of Tea Chemical Engineering, Ministry of Agriculture, Engineering Research Center for Tea Processing, Tea Research Institute, Chinese Academy of Agricultural Sciences, Hangzhou 310008, China
  • Received:2010-03-25 Revised:2010-07-01 Published:2019-09-11

Abstract: The chemical components of E8 fraction of ethyl acetate extract from Pu-erh tea was analyzed by HPLC preparative chromatography and its chemical structure was also identified by LC-MS and NMR. Results showed that five compounds were identified as follows: 3',4',5-Trihydroxy-7-Methoxyflavone, 3',4',5,7-Tetrahydroxyflavone (Luteolin), Quercetin-3-O-β-D-glucopyranoside, 3',4',7-Trihydroxy-5-methoxyflavone-7-O-β-D-glucopyranoside and 3',4',7-Trihydroxy-5-Methoxyflavone.

Key words: Pu-erh tea, E8fraction, chemical component

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