Optimization of Ionic Liquid Based Simultaneous Ultrasonic- and Microwave-Assisted Extraction of Rutin and Quercetin from Leaves of Velvetleaf (Abutilon theophrasti) by Response Surface Methodology

Table 3

ANOVA of the fitted quadratic polynomial model for the extraction yield of RU.

Source	Sum of squares	Degrees of freedom (df)	Mean squares	value	value	Remarks
Model	11.20	9	1.24	51.71	<0.0001	Significant
	4.61	1	4.61	191.70	<0.0001	Significant
	0.36	1	0.36	15.05	0.0031
	1.58	1	1.58	65.53	<0.0001	Significant
	0.027	1	0.027	1.13	0.3129
	0.0068	1	0.0068	0.28	0.6071
	0.081	1	0.081	3.38	0.0959
	3.38	1	3.38	140.34	<0.0001	Significant
	0.85	1	0.85	35.40	0.0001
	1.04	1	1.04	43.04	<0.0001	Significant
Residual	0.24	10	0.024
Lack of fit	0.19	5	0.037	3.33	0.1065	Not significant
Pure error	0.056	5	0.011
Cor. total	11.44	19