Table 1.

Experimental runs according to the central composite design (CCD) and response variables for synthesis of Ag NPs.

Sample No.	Amount of Leaf Extract (mL)	Amount of Silver Salt (mL)	λmax (nm)	Concentration (ppm)
			Exp	Pre	Exp	Pre
1	0.10	20.00	425	424.896	104.813	101.702
2	0.78	16.46	429	429.104	100.003	97.802
3	0.78	23.53	424	424.00	93.503	96.614
4	0.50	15.00	427	426.854	72.443	74.643
5	0.50	25.00	*	*	48.393	43.081
6	0.50	20.00	426	427.250	56.453	61.835
7	0.50	20.00	426	427.250	56.453	61.835
8	0.217	23.53	426	426.043	50.343	55.654
9	0.50	20.00	428	427.250	66.073	61.835
10	0.90	20.00	427	426.957	*	*
11	0.217	16.46	424	424.146	*	*
12	0.50	20.00	429	427.250	66.723	61.835
13	0.50	20.00	*	*	63.473	61.835

Exp, Experimental values of studied responses; Pre, Predicted values of studied responses. *, Out of range.