CHARACTERIZATION OF SEVERAL WEST GEORGIAN AUTOCHTHONOUS GRAPES AND THEIR WINE STILBENES
The present study was conducted to determine the content of Stilbenes in the several autochthonous West Georgian grapes and wines. Stilbenes were analyzed using HPLC-UV samples and were prepared using resin (amberlite XAD2) column, C18 Cartridge Solid Phase Extraction (SPE) Waters Sep-Pak C18 (500 mg). The identification was achieved using UPLC-PDA and MS analysis. The study was conducted on the following Stilbenes and their derivatives – Astringin, Piceid, Trans/cis resveratrol, and ε-Viniferin. The amount of stilbenes in grapes was determined as: Aladasturi-131.9±4.8 mg kg-1, Aleksandrouli 148.2±4.9 mg kg-1, Mujuretuli 215.3±7.9 mg kg-1 , Chkhaveri 77.5 ±2.5 mg kg-1, Ojaleshi 260.71±9.1mg kg-1 . In red wines the content of Stilbenes was Aladasturi-19.17±0.5 mg kg-1, Aleksandrouli 14. 87±0.4 mg kg-1, Mujuretuli 21.36±0.5 mg kg-1, Chkhaveri 14.5±0.4 mg kg-1, Ojaleshi 60.8±2.2 mg kg-1.
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