Extraction from elderberry flowers. Examination of antioxidant capacity and total phenolic content of the extracts
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2013-11-05
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Abstract
In this work we present a study on the extraction from dry elderberry flowers at ambient temperature.50 vol. % ethanol-in-water solution as a solvent is used. The variation of total dry content in the extracts, their total polyphenol content as well as their antioxidant capacity is measured in time. The experimental data show that the plateau is reached after the 90th min. The maximum yield from 2 g dry flowers is 0.52 g (120 min), the maximum total polyphenol content is 2.312 g GA/L (120 min). The best antioxidant capacity (IC50%=6.58) is measured for the 90th min extract. Nevertheless the difference between the values obtained at 90th and at 120th min is in the order of the experimental incertitude.