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 4

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

Source	Sum of squares	Degrees of freedom (df)	Mean squares	value	value	Remarks
Model	0.034	9	0.037	51.13	<0.0001	Significant
	0.012	1	0.012	158.99	<0.0001	Significant
		1		45.26	<0.0001	Significant
		1		12.92	0.0049
		1		4.53	0.0592
		1		0.90	0.3660
		1		0.72	0.4170
		1		135.98	<0.0001	Significant
		1		116.53	<0.0001	Significant
		1		21.70	0.0009
Residual		10
Lack of fit		5		2.48	0.1711	Not significant
Pure error		5
Cor. total	0.034	19