Phenolic profile, colour intensity, and radical scavenging activity of Greek unifloral honeys
2016
Karabagias, Ioannis K. | Dimitriou, Elpida | Kontakos, Stavros | Kontominas, Michael G.
The present study was designed to investigate the antioxidant properties [selected polyphenol content (SPC), radical scavenging activity] and colour intensity of Greek unifloral honeys. For this purpose, one hundred and seventy honey samples of different botanical origin (thyme, pine, orange blossom, and fir) were collected during the harvesting period 2011 and 2012 from thirteen different regions in Greece. The phenolic profile was evaluated based on the quantification of syringic acid, myricetin, quercetin, kaempferol, and chrysin using high performance liquid chromatography. Radical scavenging activity and colour intensity were estimated using spectrometric assays. Honey samples analysed showed variations in the SPC (3.86 ± 0.67 to 65.79 ± 8.08 mg/kg), colour intensity (164 ± 49 to 517 ± 110 mAU) and % radical scavenging activity (% RSA) (17.24 ± 5.50 to 50.38 ± 19.17), depending on botanical origin. On the basis of results obtained, the tested honey samples may be considered as easily accessible natural sources of antioxidants and valuable supplements to the daily diet.
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