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Bibliographic record number: 592768

Journal

Authors: Gorjanović, Stanislava; Komes, Draženka; Pastor, Ferenc T.; Belščak-Cvitanović, Ana; Pezo, Lato; Hečimović, Ivana; Sužnjević, Desanka
Title: Antioxidant Capacity of Teas and Herbal Infusions: Polarographic Assessment
Source: Journal of agricultural and food chemistry (0021-8561) 60 (2012), 38; 9573-9580
Paper type: article
Keywords: tea; herbal infusions; mate; antioxidant activity; hydrogen peroxide; DC polarography
Abstract:
Hydrogen peroxide scavenging (HPS) activity of unfermented (green, yellow, and white), partially fermented (oolong), and completely fermented (black) tea (Camellia sinensis), maté (Ilex paraguariensis), and various herbal infusions, as well as individual compounds (flavan-3-ols, flavonols, cinnamic and benzoic acids, and methylxanthines), was assessed by recently developed direct current (DC) polarographic assay. Correlations of tea and herbal infusion HPS activity with total phenolic content determined using the Folin−Ciocalteu assay (FC-GAE) (0.81 and 0.93), ferric reducing/antioxidant power (FRAP)(0.97 and 0.92), 1, 1-diphenyl-2-picrylhydrazyl (DPPH) (0.77 and 0.80), and 2, 2′-azinobis(3-ethylbenzthiazoline-6-sulfonic acid)(ABTS) scavenging (0.86 and 0.86) were statistically significant. Correlations between relative antioxidant capacity index (RACI), calculated by assigning all applied assays equal weight, and HPS (0.98), FRAP (0.97), ABTS (0.89), and DPPH (0.89) confirmed DC polarographic assay reliability when applied individually. Correlation analysis, ANOVA, and Levene and Tukey’s HSD tests unequivocally confirmed this reliable, rapid, and low-cost assay validity, clearly demonstrating its advantages over spectrophotometric assays applied.
Project / theme: 058-0000000-3470
Original language: ENG
Citation databases: Current Contents Connect (CCC)
Scopus
SCI-EXP, SSCI i/ili A&HCI
Science Citation Index Expanded (SCI-EXP) (sastavni dio Web of Science Core Collectiona)
Category: Znanstveni
Research fields:
Food processing technology
URL: http://pubs.acs.org/doi/abs/10.1021/jf302375t
Broj citata:
Altmetric:
DOI: 10.1021/jf302375t
URL cjelovitog rada:
Google Scholar: Antioxidant Capacity of Teas and Herbal Infusions: Polarographic Assessment
Contrib. to CROSBI by: abelscak@pbf.hr (abelscak@pbf.hr), 13. Ruj. 2012. u 10:42 sati



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