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2019 Journal of Agroalimentary Processes and Technologies 2019, 25(4)
 
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25 .   Evaluation of antioxidant capacity and total polyphenol content of some coffees

Authors: Alexandra Cosoreci, Camelia Moldovan, Diana- Nicoleta Raba , Mirela -Viorica Popa, Delia -Gabriela Dumbravă

Volume 20, Issue 2;
Pages: 161-164;
ISSN: 2069-0053 (print) (former ISSN: 1453-1399), Agroprint;
ISSN (online): 2068-9551



Abstract:

Purpose of this work was to determine the antioxidant capacity and total polyphenol content for a few coffees on the Romanian market. We studied four types of coffee: Arabica instant- premium category, Arabica ground, vacuum packaging- economic category, Arabica ground, vacuum packaging - premium category, Arabica powder- bulk. Antioxidant capacity was evaluated by the CUPRAC method and polyphenols were determined by the Folin- Ciocalteu method. The highest antioxidant capacity showed the sample of Arabica ground, vacuum packaging - premium category (0.434 mM Trolox /l). The lowest antioxidant activity presented the sample of Arabica ground, vacuum packaging- economic category (0.258 mM Trolox / l). In terms of total polyphenol content the sample with the highest concentration is also ground Arabica, vacuum packaging - premium category (0.196 mg gallic acid / l) and the lowest content of total polyphenols was found in coffee with the lowest antioxidant activity- ground Arabica, vacuum packaging- economic category (0.177 mg gallic acid / l).

Keywords: coffee, antioxidant capacity, CUPRAC method, polyphenol, Folin-Ciocalteu method.

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