Antiradical activity of burdock roots extracts
Key-words:
burdock root, antioxidants, antiradical activity, efficiency of extraction process
Summary
In the present work we study the antiradical activity of extracts obtained from burdock roots. We are looking for effective extractant unable for preparation of extract with high polyphenols content of potential use as a cosmetic ingredient. The total content of the phenolic compounds present in the extracts was determined by means of standard spectrophotometric method using Folin–Ciocalteu reagent following the procedure described by Singleton and Rossi using gallic acid as the reference compound. We have determined the content of flavonoids by means of the method proposed by Karadeniz et al. with (-)epicatechin as the reference compound.
We have experimentally found that the aqueous-ethanolic extracts obtained from burdock rootscontain a significant amount of phenols including flavonoids. We can state that the burdock rootscan be regarded as a valuable source of antiradical species, such as flavonoids and other polyphenols. Based on our experimental data it was concluded that the content of antiradical species in the extracts obtained using aqueous solutions of ethanol with 48% ethanol concentration is always higher than that found in the extracts obtained using only water or ethanol.
Prof. dr hab. inż. Ryszard ZIELIŃSKI
Poznan University of Economics and Business
Institute of Quality Science
Department of Technology and Instrumental Analysis
Aleja Niepodległości 10, 61-875 Poznań, Poland
tel. (+48) 61-856-9056
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