University of East Sarajevo, Faculty of Technology Zvornik, Karakaj 34a, 75400 Zvornik, Republic of Srpska, Bosnia and Herzegovina,
University of East Sarajevo, Faculty of Technology Zvornik, Karakaj 34a, 75400 Zvornik, Republic of Srpska, Bosnia and Herzegovina,
University of East Sarajevo, Faculty of Technology Zvornik, Karakaj 34a, 75400 Zvornik, Republic of Srpska, Bosnia and Herzegovina,
University of East Sarajevo, Faculty of Technology Zvornik, Karakaj 34a, 75400 Zvornik, Republic of Srpska, Bosnia and Herzegovina,
University of East Sarajevo, Faculty of Technology Zvornik, Karakaj 34a, 75400 Zvornik, Republic of Srpska, Bosnia and Herzegovina,
University of East Sarajevo, Faculty of Technology Zvornik, Karakaj 34a, 75400 Zvornik, Republic of Srpska, Bosnia and Herzegovina,
In this paper, conventional solid-liquid extraction and ultrasound-assisted extraction were utilized for (poly)phenols extraction from black elderberry flowers. The extraction lasted 30 to 120 min, with a solid-to-solvent ratio of 1:15 w/v and 1:30 w/v and solvents of 30% and 60% ethanol. Total (poly)phenols, flavonoids and anthocyanins contents were measured using the Folin-Ciocalteu reagent, aluminium chloride and the pH differential methods, respectively. The results show that the extraction process has the highest velocity in the first 30 min, when the most (poly)phenols are extracted, but it becomes slower as time passes. Higher yields are obtained by utilizing a solid-to-solvent ratio of 1:30 w/v, which indicates that when the amount of drug increases over a certain optimal value, the resistance to mass transfer from a solid material to liquid increases. Also, higher yields are obtained by using a solvent that contains a higher content of ethanol. Finally, it was
discovered that ultrasonic extraction provides to higher (poly)phenolic compound yields and can substitute conventional extraction methods.
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