Determination of Phenolic Contents and Antioxidant Activities in Different Solvents of Hatila Valley and Macahel Bee Products in Artvin, Turkey

This study determines the extracts of bee products prepared with water and ethanol extracts of royal jelly and honey; water, ethanol, 70% ethanol, propylene glycol, and 70% propylene glycol extracts of pollen and propolis have been analyzed by total polyphenol and flavonoid content and ferric-reducing power. The results of the analysis indicated that Macahel honey and propolis had higher phenolic content and antioxidant activity than Hatila honey and propolis. The propolis of both regions, whose mixtures were prepared, was determined as Macahel propolis > Hatila + Macahel propolis > Hatila propolis in terms of polyphenol and flavonoid content and ferric reducing power. Although propolis samples with 70% ethanol and 70% propylene glycol had higher solubility, the lowest solubility was in water. These differences vary depending on the geographical location, botanical variations of the region where the bee products are collected, and the solvent used for the extraction.