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Effect of brewing water on the antioxidant capacity of green tea infusion with DPPH assay

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Abstract
Brewing water plays a crucial role in flavor and potential healthy functions of tea infusion. In this study, seven water samples with different physicochemical properties were selected to brew green tea. Results showed that the brewing water with higher minerals level and pH value would reduce the yield of catechins in tea infusion, which in turn caused the decrease of antioxidant activity to a large extent. Besides, it was found that EGCG, as a major contributor to the antioxidant activity of green tea infusion, was influenced differently by different metal ions, among which Ca2+/Mg2+ could enhance the antioxidant activity of EGCG solutions with different concentration through synergistic effect, particularly Ca2+, and the effect was more markable at a higher EGCG concentration. 2ese results offered theoretical direction to the selection of tea brewing water for consumers and gave a new sight to the effects of metal ions on the antioxidant capacity of EGCG.
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peer-reviewed
Publisher
Hindawi Publishing Corporation
Citation
Journal of Chemistry;7736117, 8
Collections
Biological Sciences
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Granato_2022_Effect.pdf
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Keywords
pH value, Brewing water, Biological sciences
ULRR Identifiers
https://hdl.handle.net/10344/10907
 https://doi.org/10.34961/10520
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Funding Information
Natural Science Foundation, Program of Zhejiang, Innovation Project for Chinese Academy of Agricultural Sciences.
Sustainable Development Goals
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Article
Rights
https://creativecommons.org/licenses/by-nc-sa/1.0/
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