Optimization of Environmentally Benign Polymers Based on Thymine and Polyvinyl Sulfonate Using Plackett-Burman Design and Surface Response

Table 5

Central composite design matrix and the corresponding experimental and predicted responses for dye adsorption on crosslinked polymer process.

Run order	pH	Concentration	Absorbance^a
			Observed	Predicted
1	9.0	6	0.63	0.57
2	7.5	8	0.60	0.58
3	7.5	4	0.49	0.50
4	9.0	2	0.41	0.41
5	10.5	4	0.46	0.48
6	6.0	6	0.48	0.50
7	10.5	8	0.75	0.73
8	9.0	6	0.57	0.57
9	9.0	10	0.71	0.74
10	12.0	6	0.63	0.64

^aAbsorbance measured at 610 nm.