Simultaneous Preconcentration of Fast Green FCF and Rhodamine B Using Deep Eutectic Solvent and Determination via High-Performance Thin Layer Chromatography

Table 5

The values of R² from central composite design analysis for fast green FCF and rhodamine B.

Values of R^2	Fast green FCF	Rhodamine B
R-squared	0.9989	0.9977
Adjusted R-squared	0.9978	0.9955
Predicted R-squared	0.9942	0.9909
Adequate precision	92.664	89.016