Electrochemical quantification of the structure/antioxidant activity relationship of flavonoids

Ferreira, Rafael de Queiroz; Greco, Sandro J.; Delarmelina, Maicon; Weber, Karen C.

doi:10.1016/j.electacta.2015.02.164

Cited by 47 publications

(20 citation statements)

References 22 publications

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“…Ferreira et al, investigated the antioxidant activities of five free flavonoids and their Fe 2+ complexes with a so-called ceric reducing/antioxidant capacity assay (CRAC), which measures the consumption of the strong oxidants Ce 4+ by CA for directly quantifying the reducing power of the antioxidant samples [18]. The CRAC method has also been used to study the structure/antioxidant activity relationship of eight flavonoids, and the results are highly consistent with to the quantitative structure-property relationships [19]. These results indicate that the CRAC assay is an effective and suitable method to evaluate the antioxidant capacity of flavonoids.…”

Section: Introductionmentioning

confidence: 99%

Influence of Bovine Serum Albumin-Flavonoid Interaction on the Antioxidant Activity of Dietary Flavonoids: New Evidence from Electrochemical Quantification

Geng

Liu

et al. 2018

Molecules

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Interaction between dietary flavonoids and albumins plays an important role in the bioavailability and bioactivity of flavonoids. Therefore, the influence of this interaction on the antioxidant activity of flavonoid has attracted much interest. In this study, a ceric reducing/antioxidant capacity assay (CRAC) was employed to investigate the effects of albumin-flavonoid interaction on the antioxidant activity of seven common flavonoids. The results obtained from the CRAC assay were also compared separately with the results from the spectrophotometric methods including 2,2-diphenyl-1-picrylhydrazyl (DPPH) and ferric reducing antioxidant power (FRAP) assays. All the flavonoids show a decreasing in the antioxidant activity detected by CRAC assay, indicting a “masking effect” of bovine serum albumin (BSA)-flavonoid interaction. However, the results from DPPH and FRAP assays were conflicting, which may be attributed to the influence of solvent systems.

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Section: Introductionmentioning

confidence: 99%

Influence of Bovine Serum Albumin-Flavonoid Interaction on the Antioxidant Activity of Dietary Flavonoids: New Evidence from Electrochemical Quantification

Geng

Liu

et al. 2018

Molecules

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“…Nowadays, several methodologies, which employ the most diverse electrochemical techniques, are used in the determination of the total antioxidant capacity, among which, we can highlight the cyclic voltammetry [27] already mentioned, besides others, such as: differential pulse voltammetry [28], square wave voltammetry [29,30] and amperometry [31,32].…”

Section: Introductionmentioning

confidence: 99%

Antioxidant Capacity and Total Phenol Content in Hop and Malt Commercial Samples

et al. 2017

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The antioxidant properties of commercial hops and malted barley were evaluated by electroanalytical methods and compared with spectrophotometric methods. Hop group showed better antioxidant capacity and total phenols content (TPC) values than malt group. The highest electrochemical Index (EI) was observed for HCO hop sample. Electrochemical Index (EI) showed a good Pearson correlation with ABTS (2,2′‐azino‐bis (3‐ethylbenzothiazoline‐6‐sulphonic acid)), DPPH (2,2‐diphenyl‐1‐picrylhydrazyl), and TPC, being of 0.85, 0.77 and 0.86 respectively for hop samples. While for the malt samples were 0.96, 0.69 and 0.49, respectively. The samples were compared to each other within each group and statistical differences can be observed, p<0.05. Therefore, the electroanalytical tools showed to be practical and easy to evaluate the antioxidant properties of hop and malt samples. The results may contribute to the selection of raw material for brewing and therefore with the quality of one of beverage one most consumed around the world.

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“…The aim of this study was to improve the assay for TAP [4,16,18,19] related to the DPPH • . Conditions for the separation of various forms of DPPH were developed.…”

Section: Introductionmentioning

confidence: 99%

Estimation of the total antioxidant potential in the meat samples using thin-layer chromatography

2020

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AbstractThere is limited literature on the antioxidative properties of food of animal origin. Measurements of antioxidative properties are usually performed using the reaction of reduction of colored 2,2-diphenyl-1-picrylhydrazyl (DPPH) radials. Changes of the DPPH color are tracked photometrically. These measurements are interfered by both, the tested samples and reduced DPPH. This study aims to demonstrate the ability to separate different forms of DPPH (DPPH• and DPPH-H) by thin-layer chromatography (TLC). Further, it has been practically applied in the study of the determination of antioxidative properties of the meat samples. It was found that TLC can be used for the separation of different forms of DPPH as well as for measurement of TAP (total antioxidant potential) values related to the DPPH•. The strongest antioxidant properties were observed for pork neck extracted in buffer pH 2 and for smoked salmon fish extracted in acetone, the lowest for veal and turkey fillet extracted in methanol.

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Electrochemical quantification of the structure/antioxidant activity relationship of flavonoids

Cited by 47 publications

References 22 publications

Influence of Bovine Serum Albumin-Flavonoid Interaction on the Antioxidant Activity of Dietary Flavonoids: New Evidence from Electrochemical Quantification

Influence of Bovine Serum Albumin-Flavonoid Interaction on the Antioxidant Activity of Dietary Flavonoids: New Evidence from Electrochemical Quantification

Antioxidant Capacity and Total Phenol Content in Hop and Malt Commercial Samples

Estimation of the total antioxidant potential in the meat samples using thin-layer chromatography

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