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茶叶科学 ›› 2013, Vol. 33 ›› Issue (4): 386-395.doi: 10.13305/j.cnki.jts.2013.04.012

• • 上一篇    

不同等级普洱茶的化学成分及抗氧化活性比较

吕海鹏1,2, 林智2, *, 张悦2, 梁月荣1,*   

  1. 1. 浙江大学茶叶研究所,浙江 杭州 310058;
    2. 中国农业科学院茶叶研究所,浙江 杭州 310008
  • 收稿日期:2013-01-21 修回日期:2013-03-07 出版日期:2013-08-30 发布日期:2019-09-04
  • 通讯作者: *
  • 作者简介:吕海鹏(1980— ),男,山东沾化人,博士研究生,主要从事茶叶加工化学研究。
  • 基金资助:
    国家自然科学基金(31000317)、云南省创新办科技计划课题(2007YNCXB-01-01)

Comparison of Chemical Constituents and Antioxidative Activities among Different Grades of Pu-erh Tea

LV Hai-peng1,2, LIN Zhi2,*, ZHANG Yue2, LIANG Yue-rong1,*   

  1. 1. Zhejiang University Tea Research Institute, Hangzhou 310058, China;
    2. Tea Research Institute, Chinese Academy of Agricultural Sciences, Hangzhou 310008, China
  • Received:2013-01-21 Revised:2013-03-07 Online:2013-08-30 Published:2019-09-04

摘要: 选用高、中、低三类不同等级的普洱茶为研究对象,研究比较了它们的抗氧化活性、香气成分及其主要理化成分含量的差异。结果表明,高、低两类等级的普洱茶相比,总氧化活性、清除羟自由基活性、清除DPPH自由基活性、醇类香气成分总量、杂氧化合物香气成分总量、黄酮总量以及茶色素含量等,一般都存在显著性差异(P<0.05);而中等级的普洱茶与高或低等级的普洱茶相比,除总氧化活性、清除羟自由基活性、茶多酚含量和黄酮总量存在显著性差异外(P<0.05),其他理化成分的含量一般都不存在显著性差异(P>0.05)。主成分分析表明,抑制羟自由基活性、总抗氧化活性、黄酮总量、茶褐素含量以及醇类香气成分总量等是区分普洱茶等级的重要理化指标。

关键词: 普洱茶, 等级, 抗氧化活性, 化学成分

Abstract: The antioxidative activity, aroma constituents and the major chemical components of three grades of Pu-erh tea, i. e. high, medium and low grade, were studied and compared. Results showed that the significant difference(P<0.05)was shown in evaluation of the total antioxidative activity, scavenging hydroxyl free radical activity, scavenging DPPH free radical activity, total amount of alcohols compounds, total amount of heterocyclic oxygen compounds, total flavonoids and tea pigments between high and low grades. When compared with high or low grade, the medium grade of Pu-erh tea was found no significant difference(P>0.05)in the others testing index except the total antioxidative activity, scavenging hydroxyl free radical activity, tea polyphenols and total flavonoids. Principal component analysis showed that the important indicator to distinguish the grade of Pu-erh tea seemed to be the scavenging hydroxyl free radical activity, the total antioxidative activity, tea polyphenols, total flavonoids and total amount of alcohols compounds.

Key words: Pu-erh tea, grade, antioxidative activity, chemical constituents

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