Antioxidant properties of coffee substitutes rich in polyphenols and minerals

Mariola Samsonowicz , Ewa Krystyna Regulska , Danuta Karpowicz , Barbara Leśniewska

Abstract

The analysis of general content of polyphenols, minerals and antioxidant activity of infusions from selected coffee substitutes is presented. The obtained results showed that the coffee infusions prepared from acorns exhibit the highest radical scavenging capacities for DPPH (EC50 = 0.063-0.066 mgd.w./mL), ABTS (EC50 = 0.021-0.029 mgd.w./mL), OH(EC50 = 2.050-2.378 mgd.w./mL) as well as the highest ability to Fe3+ reduction (FRAP) (∼1.1 mmolFe/gd.w). These coffee substitutes also contain the greatest values of polyphenols (45-50 mgGA/gd.w). Analyzed coffee substitutes differ in both quality and quantity of polyphenols, but all tested coffees contain gallic and chlorogenic acids. The most of phenolic compounds was found in herbal-cereal coffee substitute. The quantitative results and PCA analysis indicated a good correlation between the antioxidant activity and total polyphenols, flavonoids and gallic acid content. Using the obtained data on the composition and antioxidant properties of extracts the cluster analysis (CA) was performed to distinguish similar or close types of coffee.
Author Mariola Samsonowicz (FCEE / DCBB)
Mariola Samsonowicz,,
- Department of Chemistry, Biology and Biotechnology
, Ewa Krystyna Regulska (FCEE / DCBB)
Ewa Krystyna Regulska,,
- Department of Chemistry, Biology and Biotechnology
, Danuta Karpowicz (FCEE)
Danuta Karpowicz,,
- Faculty of Civil and Environmental Engineering
, Barbara Leśniewska
Barbara Leśniewska,,
-
Journal seriesFood Chemistry, ISSN 0308-8146, (N/A 200 pkt)
Issue year2019
Vol278
Pages101-109
Publication size in sheets0.5
Keywords in EnglishAntioxidant; Coffee substitutes; Minerals; Polyphenols
ASJC Classification2700 General Medicine; 1106 Food Science; 1602 Analytical Chemistry
DOIDOI:10.1016/j.foodchem.2018.11.057
Internal identifier000044614
Languageen angielski
Score (nominal)200
Score sourcejournalList
ScoreBUT score = 48.0, 17-06-2019, manual
Ministerial score = 200.0, 12-02-2020, ArticleFromJournal
Publication indicators Scopus SNIP (Source Normalised Impact per Paper): 2018 = 2.17; WoS Impact Factor: 2018 = 5.399 (2) - 2018=5.488 (5)
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