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

Table 8

Inter- and intraday precision for the determination of ORLX in the bulk powder using the optimum conditions.

ORLX-Sm(III)			ORLX-Tb(III)
Interday precision
Concentration (ng/mL)	Mean% recovery ± SD	% error	Concentration (ng/mL)	Mean% recovery ± SD	% error
25.00	100.70 ± 0.30	0.70	25.00	100.70 ± 0.30	0.70
300.0	100.55 ± 0.13	0.55	300.0	100.55 ± 0.13	0.55
500.0	99.92 ± 0.76	0.46	500.0	100.36 ± 0.76	0.46
Intraday precision
Concentration (ng/mL)	Mean% recovery ± SD	% error	Concentration (ng/mL)	Mean% recovery ± SD	% error
25.00	101.21 ± 2.99	2.71	25.00	101.05 ± 1.40	1.05
200.0	100.95 ± 0.75	0.95	200.0	97.54 ± 0.66	2.46
500.0	99.93 ± 0.69	0.54	400.0	100.40 ± 1.33	0.94