Optimized Conditions for Flavonoid Extraction from Pomelo Peel Byproducts under Enzyme- and Ultrasound-Assisted Extraction Using Response Surface Methodology

Table 5

Predicted and experimental values of the responses at optimal conditions^1,2.

	Independent variables				TFC (mg RE/g)
	Ratio (mL/g)	Enzyme conc. (%, v/m)	Incubation time (min)	Ultrasonic time (min)
Theoretical optimal condition	142.99	3.45	65.23	69.26	10.92^a
Experimental condition	143	3.45	65	69	10.69^a

¹TFC: total flavonoid content. ²Values (mean ± standard deviation) followed by the different superscript letter are significantly different ().