title: The determination of phenolic profiles of Serbian unifloral honeys using ultra-high-performance liquid chromatography/high resolution accurate mass spectrometry.
abstract: Polyphenolic profiles of 44 unifloral Serbian honeys were analyzed using ultra-high-performance liquid chromatography (UHPLC) coupled with hybrid mass spectrometer which combines the Linear Trap Quadrupole (LTQ) and OrbiTrap mass analyzer. Rapid UHPLC method was developed in combination with a high sensitivity accurate mass scan and a simultaneous data dependent scan. The honey samples were of different botanical origin: acacia (Robinia pseudoacacia), sunflower (Helianthus annuus), linden (Tilia cordata), basil (Ocimum basilicum), buckwheat (Fagopyrum esculentum), oilseed rape (Brassica napus), and goldenrod (Solidago virgaurea). The presence of 43 compounds, mainly flavonoids, was proven in all honey samples by their characteristic mass spectra and fragmentation pattern. Relatively high amounts of chrysin, pinocembrin and galangin were identified in all honey extracts. p-Coumaric acid was not detected in basil, buckwheat and goldenrod honey extracts. A larger amount of gallic acid (max value 1.45 mg/kg) was found in the sunflower honey, while a larger amount of apigenin (0.97 mg/kg) was determined in the buckwheat honey in comparison with other honeys. The samples were classified according to the botanical origin using pattern recognition technique, Principal Component Analysis (PCA). The LTQ OrbiTrap technique was proven to be reliable for the unambiguous detection of phenolic acids, their derivatives, and flavonoid aglycones based on their molecular masses and fragmentation pattern.
authors.affiliation: Analysis, Gandijeva 76a, 11070 Belgrade, Serbia.
authors.forename: Silvio
authors.initials: S
authors.lastname: Kečkeš
authors.forename: Uroš
authors.initials: U
authors.lastname: Gašić
authors.forename: Tanja Ćirković
authors.initials: TĆ
authors.lastname: Veličković
authors.forename: Dušanka
authors.initials: D
authors.lastname: Milojković-Opsenica
authors.forename: Maja
authors.initials: M
authors.lastname: Natić
authors.forename: Živoslav
authors.initials: Ž
authors.lastname: Tešić
mesh_terms: D002851:Chromatography, High Pressure Liquid / Q000379:methods*; D006722:Honey / Q000032:analysis*; D013058:Mass Spectrometry / Q000379:methods*; D059808:Polyphenols / Q000737:chemistry*; D055771:Serbia
chemical_list: D059808:Polyphenols