普洱茶E8组分的化学成分研究

doi:10.13305/j.cnki.jts.2010.06.003

Abstract

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

CLC Number:

LU Hai-peng, LIN Zhi, ZHONG Qiu-sheng, WANG Li. Study on the Chemical Component of E8 Fraction from Pu-erh Tea[J]. Journal of Tea Science, 2010, 30(6): 423-428.

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

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