Journal of Analytical Science and Technology

Table 4 Model selection for essential oil and pectin extraction

From: Optimization of oil and pectin extraction from orange (Citrus sinensis) peels: a response surface approach

Essential oil					Pectin
Model	Linear	2FI	Quadratic	Cubic	Linear	2FI	Quadratic	Cubic
Std. dev.	0.46	0.49	0.47	0.53	2.25	2.37	2.62	0.67
R²	0.70	0.70	0.79	0.80	0.84	0.85	0.86	0.99
Mean	2.09	2.09	2.09	2.09	19.75	19.75	19.75	19.75
Adjusted R²	0.64	0.60	0.63	0.53	0.80	0.78	0.73	0.98
C.V.	22.18	23.36	22.31	25.39	11.39	12.01	13.26	3.40
Predicted R²	0.29	0.01	− 0.50	− 21.70	0.70	0.38	− 0.13	0.79
PRESS	5.05	7.12	10.67	161.73	146.73	304.36	557.50	102.72
Adeq. Precision	9.73	8.00	6.84	5.50	16.80	12.81	9.80	28.08
Significant terms	A, B	A, B	A, B	–	A, B, C	A, B, C	A, B, C	B, C², AB, BC, A³, B³, C³

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