Application of Samarium- and Terbium-Sensitized Luminescence via a Multivariate-Based Approach for the Determination of Orbifloxacin

Table 1

Screened numerical variables and their low, mid-, and high limits.

Variables	Low (−1)	Center point (0)	High (+1)
pH (A)	5.0	6.5	8.0
Temperature, Temp (°C) (B)	25	47.5	70
Contact time, CT (min) (C)	10	50	90
Metal volume, MV (mL) (D)	0.5	1.25	2