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Croatica Chemica Acta, Vol. 89 No. 1, 2016.

Original scientific paper

https://doi.org/10.5562/cca2656

Evaluation of Antioxidant Activities of Some Small Fruits Containing Anthocyanins Using Electrochemical and Chemical Methods

Adina Căta ; National Institute of Research and Development for Electrochemistry and Condensed Matter, Dr. Aurel Păunescu Podeanu 144, 300569, Timişoara, Romania
Mariana N. Ştefănuţ orcid id orcid.org/0000-0002-1591-8602 ; National Institute of Research and Development for Electrochemistry and Condensed Matter, Dr. Aurel Păunescu Podeanu 144, 300569, Timişoara, Romania
Raluca Pop ; University of Medicine and Pharmacy, Eftimie Murgu Square 2, 300041, Timişoara, Romania
Cristian Tănasie ; National Institute of Research and Development for Electrochemistry and Condensed Matter, Dr. Aurel Păunescu Podeanu 144, 300569, Timişoara, Romania
Cristina Moşoarcă ; National Institute of Research and Development for Electrochemistry and Condensed Matter, Dr. Aurel Păunescu Podeanu 144, 300569, Timişoara, Romania
Alina D. Zamfir ; National Institute of Research and Development for Electrochemistry and Condensed Matter, Dr. Aurel Păunescu Podeanu 144, 300569, Timişoara, Romania

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Abstract

The objective of this work was to estimate the antioxidant capacity of some fruits extracts containing anthocyanins (strawberry, raspberry, elderberry, mulberry, blackberry, bilberry, black and red currant) using an electrochemical technique and three classical chemical methods based on reaction between antioxidants and a chromogen compound. evaluation of antioxidant activities of extracts was performed by using FRAP (ferric reducing/antioxidant capacity), ABTS (2,2’-azinobis[3-ethylbenzothiazoline-6-sulphonate]) and DPPH (2,2-diphenyl-1-picrylhydrazyl) assays. Antioxidant activities of the extracts were correlated with their content of monomeric anthocyanins and total phenolics. Good correlations were obtained especially between antioxidant activities and total phenolics content. Cyclic voltammetry was used for the evaluation of overall reducing capacity of the extracts using a glassy carbon electrode. Reducing capacity of selected fruits extracts was assessed based on the half-peak potential (E1/2) of the first oxidation peak. The oxidation potentials characterized by E1/2 value were not correlated with the antioxidant activities evaluated by the classical methods.

This work is licensed under a Creative Commons Attribution 4.0 International License.

Keywords

anthocyanins; total phenolics; antioxidant activity; cyclic voltammetry

Hrčak ID:

155798

URI

https://hrcak.srce.hr/155798

Publication date:

20.6.2016.

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