engleski

High-pressure recovery of anthocyanins from grape skin pomace (Vitis vinifera cv. Teran) at moderate temperature

The objective was to evaluate the influences of the high hydrostatic pressure extraction parameters on the recovery of anthocyanins from the grape skin pomace extracts (Vitis vinifera cv. Teran)under moderate temperatures. Studied parameters were: solvents (methanol and ethanol) ; solvent concentrations (30, 50, and 70%) ; pressures (300, 400, and 500 MPa) ; times (3, 6.5, 10 min) ; and temperatures (22, 26, 30 8C). Predominant anthocyanins in all extracts were malvidins (malvidin-3-glucoside as the main compound) representing 55.77% of overall anthocyanin content. The type of solvent did not significantly influence anthocyanin extraction yield, while decreased solvent concentration (increased solvent-to-water ratio) significantly improved extraction of anthocyanins. Increase of pressure enhanced extraction yield of the anthocyanins but temperature showed stronger impact on the anthocyanins recovery. This investigation evidenced that the best conditions for HHPE of anthocyanins from grape pomace were extraction time 3.39 min, extraction temperature 29.48 8C, pressure 268.44 MPa and solvent concentration 70%.

Grape skin pomace ; High hydrostatic pressure extraction ; Anthocyanins

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