A Three-Step Approach to Estimation of Reduction Potentials of Natural Mixtures of Antioxidants Based on DPPH Test; Illustration for Catechins and Cocoa

Proceedings

Klaudia Suliborska¹  Wojciech Chrzanowski¹  Monika Baranowska¹  Barbara Kusznierewicz¹  Agnieszka Bartoszek¹ 

[1]Faculty of Chemistry, University of Gdansk, 11/12 Narutowicza St, 80-233 Gdansk, Poland

关键词: standard reduction potential;    stoichiometry value;    DPPH test;    antioxidants;   

DOI  :  10.3390/proceedings2019011004

来源: DOAJ

【 摘 要 】

The aim of this study is to propose a methodology to assess electrochemical properties of complex mixtures of antioxidants, such as plant extracts, based on the results of simple and popular DPPH test. The first, most difficult step, involves determinations of standard reduction potentials (E⁰) for the series of purified compounds (here catechins). The next step is the calculation of stoichiometric values (n₁₀) based on the results of DPPH test for the same compounds. Finally, a correlation equation is formulated, which is then employed to estimate “cumulative reduction potential” (E_c) for the mixture of interest (here cocoa) using DPPH test results.

【 授权许可】

Unknown