Table 5.

ANOVA results obtained for factorial model

Source	Sum of squares	df	Mean square	F value	p value
Model	0.0264	2	0.0132	4.46	0.0356	Significant
A-Flow rate	0.0021	1	0.0021	0.7203	0.4127
C-ACN ratio	0.0243	1	0.0243	8.20	0.0142
Residual	0.0355	12	0.0030
Lack of fit	0.0341	2	0.0171	121.93	< 0.0001	Significant
Pure error	0.0014	10	0.0001
Cor total	0.0620	14