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EVALUATION OF TOTAL PHENOLIC CONTENT AND ANTIOXIDANT PROPERTIES OF THE WATER EXTRACT OF THE POWDERED BARLEY GRASS (HORDEUM VULGARE L.)

DOI: 10.19202/j.cs.2016.02.03

 

Key words:

barley, antioxidant activity, total phenolic content, TEAC, FRAP, DPPH.

Summary
Barley (Hordeum vulgare L.) is one of the basic cereal grain cultivated in Poland. It is commonly used for livestock feeding and for human consumption. In terms of nutrition, the functionality of barley grains is primarily determinated by content of important nutrients and prebiotics such as proteins, dietary fiber and β-glucans. Recently food and food supplements based on green barley parts has been gaining popularity. Young plant parts which exhibit increased contents of some vitamins, provitamins and other bioactive substances are particularly valued. Therefore, young barley leaves are promoted as the interesting part of modern diet which may improve the balance of the nutrients intake and as a rich source of phenolic antioxidants such as phenolic acid derivatives, proanthocyanidins, quinones, and flavonoids.
In this study the total phenolic content, the flavonoids content and the antioxidant activity of water extract of powdered barley grass was evaluated. The amount of total phenolics in water extracts from powdered barley grass was 3.17±0.22 mg GAE/g DW. The largest fraction of total phenolics was water-soluble flavonoids. The literature data have demonstrated that the main compound occurring in highest concentration in barley leaves have been isoorientin-7-O- -glucoside (lutonarin) and 7-O-glycosylisovitexin (saponarin). The tested extracts exhibit also significant antiradical and ferric-reducing properties.

dr inż. Justyna KIEWLICZ
Poznań University of Economics
Faculty of Commodity Science
Department of Technology and Instrumental Analysis
Al. Niepodległości 10, 61-875 Poznań, Poland
phone: (+48) 61-854-3870
e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.

 

 

 

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