Table 5.

Model validation results (predicted and actual values for enhancing the main response).

Method	Variable level			Particle size (nm)	Deviation
	Salt*1 conc. (mM)	Filtrate*2 volume (ml)	pH
Design Expert’s model prediction	0.772	19.97	4.31	42.9	3.3%
Experimental value (tested/Actual)	0.77	20	4.14	41.5