Influence of Preparation of Green Tea Infusions on Antioxidant Capacity and Its Correlation with the Composition of Phenolic Compounds

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216275%3A25310%2F15%3A39900596" target="_blank" >RIV/00216275:25310/15:39900596 - isvavai.cz</a>

Result on the web

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DOI - Digital Object Identifier

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Result language

angličtina

Original language name

Influence of Preparation of Green Tea Infusions on Antioxidant Capacity and Its Correlation with the Composition of Phenolic Compounds

Original language description

Green tea is a rich source of polyphenols with antioxidant properties, which can be determined using various methods. In this work, two spectrophotometric methods based on the scavenging activity of the radicals (2,2-diphenyl-1-picrylhydrazyl, 2,2'-azino-bis(3-ethylbenzothiazoline-6-sulfonic acid)) were used together with the spectrophotometric method based on the ferric reduction power of phenolic compounds. The results obtained using all three methods were compared and discussed for twenty three green tea samples with different origin and treatment. A reversed phase high-performance liquid chromatography method for determination of some phenolic compounds presented in green tea sample infusions was developed. The liquid chromatography coupled with an atmospheric pressure chemical ionization mass spectrometry was used for the identification of individual phenolic compounds. Identified phenolic compounds were quantified using spectrophotometric detection. Obtained quantitative data were subjected to a multivariate statistical analysis (principal component analysis and hierarchical clustering) and correlated with the total antioxidant capacity of green tea infusions with respect to the contribution of individual phenolic compounds.

Czech name

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Czech description

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Type

J_x - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)

CEP classification

CB - Analytical chemistry, separation

OECD FORD branch

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Project

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Continuities

S - Specificky vyzkum na vysokych skolach

Publication year

2015

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Journal of Research Analytica

ISSN

nemá

e-ISSN

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Volume of the periodical

1

Issue of the periodical within the volume

1

Country of publishing house

GB - UNITED KINGDOM

Number of pages

11

Pages from-to

17-27

UT code for WoS article

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EID of the result in the Scopus database

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