Optimization of Deep Eutectic Solvents Extraction of Effective Components from Phellodendron chinense Schneid by Response Surface Methodology

Table 5

Results of variance analysis of PcS extraction process response surface test.

Source	Sum of squares	Df	Mean square	value	value
Model	686.04	14	49.00	4.75	0.0031	Significant
A	84.99	1	84.99	8.25	0.0123
B	28.09	1	28.09	2.73	0.1210
C	272.82	1	272.82	26.47	0.0001
D	3.35	1	3.35	0.32	0.5779
AB	3.88	1	3.88	0.38	0.5494
AC	3.17	1	3.17	0.31	0.5882
AD	0.17	1	0.17	0.016	0.9006
BC	0.11	1	0.11	0.011	0.9178
BD	20.95	1	20.95	2.03	0.1758
CD	46.13	1	46.13	4.48	0.0528
A^2	23.66	1	23.66	2.30	0.1520
B^2	43.58	1	43.58	4.23	0.0589
C^2	100.70	1	100.70	9.77	0.0074
D^2	15.92	1	15.92	1.54	0.2343
Residual	144.28	14	10.31
Lack of fit	104.15	10	10.42	1.04	0.5313	Not significant
Pure error	40.13	4	10.03
Cor. total	830.32	28
R-squared	0.8262
Adj. R-squared	0.6525
C.V.%	3.64
Adeq. precision	7.821