Table 3.

Chromatographic factors for central composite response surface methodology.

Run	Factor 1	Factor 2	Factor 3
	A:Toluene volume (mL)	B:Chamber saturation time (minute)	C:Wavelength (nm)
1	8	26.63	290
2	6	32	280
3	8	30	273.18
4	8	33.36	290
5	4.63	30	290
6	8	30	306.81
7	10	28	280
8	8	30	290
9	8	30	290
10	10	32	300
11	10	32	280
12	11.36	30	290
13	6	32	300
14	6	28	300
15	8	30	290
16	6	28	280
17	10	28	300