Contents and antioxidant activities of phenolic compounds in Hawk tea with different maturity levels

To study the difference in the contents of phenolics and the antioxidant activities between two kinds of Hawk tea of different maturity levels, and to evaluate their qualities, the contents of 15 phenolic compounds were determined using LC-MS/MS method. Then, the antioxidant activities of two types...

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Bibliographic Details
Published inGuangxi zhiwu Vol. 44; no. 6; pp. 1170 - 1181
Main Authors LI Zhirong, SHAO Qiju, WU Qimei, LI Ying, LI Wenyang, FANG Cancan, XIAO Shiji, CHEN Rongxiang
Format Journal Article
LanguageChinese
Published China Science Publishing & Media Ltd. (CSPM) 01.06.2024
Subjects
antioxidant activity
correlation analysis
hawk tea
lc-ms/ms
phenolic compounds
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Summary:To study the difference in the contents of phenolics and the antioxidant activities between two kinds of Hawk tea of different maturity levels, and to evaluate their qualities, the contents of 15 phenolic compounds were determined using LC-MS/MS method. Then, the antioxidant activities of two types of tea were evaluated using DPPH radical scavenging rate, ABTS+ radical scavenging rate, and Fe3+ ferric reducing antioxidant power (FRAP). And then, the contents of 15 phenolic compounds and the antioxidant activities between two kinds of Hawk tea of different maturity levels were analyzed by analysis of variance (ANOVA). Based on the contents of 15 phenolic compounds, hierarchical cluster analysis (HCA), principal component analysis (PCA), and orthogonal partial least square-discriminant analysis (OPLS-DA) were used to classify two kinds of Hawk tea. Finally, the contribution of different phenolic compounds in Hawk tea to antioxidation was discussed by partial least square regression analysis (PLSR). The results
ISSN:1000-3142
DOI:10.11931/guihaia.gxzw202302010