8种市售茶类饮料抗氧化活性及总酚含量的研究

采用FRAP、DPPH和ABTS3种方法测定了8种市售茶类饮料的抗氧化活性并用Folin—Ciocaheu法测定其总酚含量。结果表明:8种茶类饮料在抗氧化活性和总酚含量方面是很好的抗氧化剂来源。在FRAP和ABTS试验中,绿茶饮料的抗氧化活性最强,TEAC平均值分别为5878.66、7266.99μmol/L,红茶饮料的抗氧化活性最弱,TEAC平均值分别为2748.40、3478.71μmol/L;在DPPH试验中.红茶饮料的抗氧化活性最强,VCEAC平均值为20406.10μmol/L,绿茶饮料的抗氧化活性最弱.VCEAC平均值为17481.76μmol/L;总酚含量结果表明,绿茶饮料450...

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Published in广东农业科学 Vol. 40; no. 18; pp. 101 - 104
Main Author 黄莹偲 储大可 邓晓婷 陈冠林 钟南京 郭娟 夏敏 高永清
Format Journal Article
LanguageChinese
Published 广东药学院食品科学学院,广东中山,528458%中山大学公共卫生学院,广东广州,510080 2013
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ISSN1004-874X

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Summary:采用FRAP、DPPH和ABTS3种方法测定了8种市售茶类饮料的抗氧化活性并用Folin—Ciocaheu法测定其总酚含量。结果表明:8种茶类饮料在抗氧化活性和总酚含量方面是很好的抗氧化剂来源。在FRAP和ABTS试验中,绿茶饮料的抗氧化活性最强,TEAC平均值分别为5878.66、7266.99μmol/L,红茶饮料的抗氧化活性最弱,TEAC平均值分别为2748.40、3478.71μmol/L;在DPPH试验中.红茶饮料的抗氧化活性最强,VCEAC平均值为20406.10μmol/L,绿茶饮料的抗氧化活性最弱.VCEAC平均值为17481.76μmol/L;总酚含量结果表明,绿茶饮料450.76μg GAE/mL〉乌龙茶饮料357.91μg GAE/mL〉红茶饮料247.83μg GAE/mL。此外,试验结果显示.茶饮料的总酚含量与其抗氧化活性并不一定存在量效关系。
Bibliography:antioxidant activity; tea drinks; total phenolic contents
44-1267/S
FRAP, DPPH and ABTS methods were used to determine the antioxidant activities of eight kinds of commercial tea drinks, and Folin-Ciocalteu method was used to determine their total phenolic contents. Results indicated that eight kinds of tea drinks were significant sources of antioxidants in terms of their antioxidant activities and total phenolic contents. In FRAP and ABTS assays, green tea drinks exhibited the highest antioxidant activity with the mean values of TEAC 5 878.66 and 7 266.99 μmol/L respectively, black tea drinks had the lowest antioxidant activity with the mean values of TEAC 2 748.40 and 3 478.71 μmol/L respectively; in DPPH assay, black tea drinks exhibited the highest antioxidant activity with the mean value of VCEAC 20 406.10 μmol/L, and green tea drink had the lowest antioxidant activity with the mean value of VCEAC 17 481.76 μmol/L; total phenolic contents study showed: green tea drinks 450.76μg GAE/mL 〉 oolong tea drinks 3
ISSN:1004-874X