Table 6 Face-centered CCD ANOVA results for peak area

Model

1.064E+007

5

2.129E+006

41.19

0.0001

X₁

2.654E+005

1

2.654E+005

5.14

0.0578

X₂

2.885E+006

1

2.885E+006

55.83

0.0001

X₁ X₂

2.127E+006

1

2.127E+006

41.16

0.0004

X₁²

1.283E+005

1

1.283E+005

2.48

0.1592

X₂²

3.919E+006

1

3.919E+006

74.84

0.0001

Residual

3.617E+005

7

51674.84

Lack of fit

3.263E+005

3

1.088E+005

12.29

0.0174

Pure error

35393.43

4

8848.36

Total

1.100E+007

12