Ultrasound-assistedextraction(UAE)ofpectinfromgrape
pomace
Pectin wasextractedusingconstantultrasonicpower
in anultrasonicbathwithinternaldimensionsof
24.0cm×13.7cm×15.0cmandacapacityof4.25L(Elma-
sonic S40H,Singen,Germany).Thevariableconditionswere
extraction temperature(X1), extractiontime(X2), andpH(X3) of
the citricacidsolution.
To determinethepowerthatwasactingonthesample,achar-
acterization oftheultrasonicbathwasperformedaccordingtothe
equation (Eq. (1)) proposedby Raso etal.(1999). Thecalculated
power wasexpressedaspowerdensity(Sivakumar andPandit,
2001).
Power Density