Several varieties of grape cane waste were processed by finely grinding the sample followed by soxhlet extraction using hexanes then ethyl acetate.  The ethyl acetate extracts were further processed by removing the solvent under reduced pressure and dissolving the residue with methanol and diluting to 50 mL.  The methanol extracts were analyzed by HPLC using the C-18 standard reverse phase column and 50 nM H3PO4/methanol gradient to resolve the reseveratrol peak and detect it at 320 nM.  Our data indicates a clear difference between the varieties examined so far with Cabernet Sauvignon yielding the highest levels of resveratrol in its cane waste.  The results from other varieties will be reported.

Resveratrol content analysis in several varieties of grape cane waste via HPLC

247th National Meeting (2014)

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