Authors
Title
Abstract
The objective of the research study was to develop a method of extracting anthocyanins from fruits of chokeberry, elderberry and blackcurrant as well as from black carrot roots. The following solutions were used to extract anthocyanins: water acidified with acetic acid (0.75 % w/w), water acidified with hydrochloric acid (0.75 % w/w), methanol/water/acetic acid (40: 60: 0.5 v / v / v), and acetone/water/acetic acid (70: 29.5: 0.5 v / v / v). In the extracts produced, the content of phenolic compounds and anthocyanins was determined, and, on the basis thereof, the extraction kinetics was analyzed. Furthermore, the antioxidant properties of the extracts obtained were analyzed with the use of ABTS•+ and FRAP tests. During the process of extracting anthocyanins from fruits of chokeberry, elderberry, and blackcurrant, the aqueous methanol with acetic acid added and the aqueous solution of acetic acid appeared to be the optimal extractants, while, during the extraction of anthocyanins from black carrot roots, the best results were achieved when using the aqueous solution of methanol with acetic acid added and the aqueous solution of acetone with acetic acid added.
Keywords
anthocyanins, extraction, antioxidant properties, ABTS•+, FRAP