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Journal of Tea Science ›› 2007, Vol. 27 ›› Issue (2): 104-110.doi: 10.13305/j.cnki.jts.2007.02.002

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Study on the Gallic Acid in Pu-erh Tea

LU Hai-peng1, LIN Zhi1, 2, *, GU Ji-ping1, GUO Li1, TAN Jun-feng1   

  1. 1. Key Laboratory of Tea Chemical Engineering ,Ministry of Agriculture; Tea Research Institute ,Chinese Academy of Agricultural Sciences, Hangzhou 310008, China;
    2. State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming 650204, China
  • Received:2006-09-07 Revised:2006-10-30 Online:2007-06-25 Published:2019-09-11

Abstract: Gallic acid is a characteristic phenolic compound in Pu-erh tea with notable bioactivity. The content of gallic acid in Pu-erh tea, the change of gallic acid during the pile-fermentation, and the relation between extract fraction bioactivity and its gallic acid content were studied. Results showed that the average content of gallic acid in Pu-erh tea was 9.01βmg/g, but striking dissimilarity existed between the different samples; The gallic acid content first increased to some extent then decreased during the pile-fermentation of the solar green tea of [Camellia sinensis (Linn.) var. assamica (Masters) Kitamura]. It was found that the extracted fractions which rich in gallic acid showed higher antioxidative activities by DPPH radical scavenging assay.

Key words: Pu-erh tea, gallic acid, biological activity

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