Determination of levofloxacin, norfloxacin, and moxifloxacin in pharmaceutical dosage form or individually using derivative UV spectrophotometry

Table 4 Precision Study norfloxacin

Sample No	% Assay	Intra-day assay			Inter-day assay
Sample No	(repeatability)	1st h	3rd h	8th h	1st day	3rd day	5th day	7th day
1	100.07	99.58	100.25	99.5	100.2	100.2	98.2	100.52
2	100.5	99.5	100.39	99.5	99.8	99.8	100.5	100.2
3	101.5	100.25	101.25	101.2	99.2	99.6	100.9	100.25
4	100.25	101.02	100.2	99.5	100.8	101.5	100.8	98.9
5	100.25	99.6	99.85	99.35	101.25	101.8	99.9	99.6
6	100.2	99.58	99.8	99.7	100.18	100.2	100.9	99.2
Mean ± SD	100.25 ± 0.52	99.59 ± 0.60	100.2 ± 0.52	99.5 ± 0.69	100.19 ± 0.72	100.2 ± 9.13	100.65 ± 1.05	99.9 ± 0.646
% RSD	0.527462	0.604795	0.524404	0.698868	0.723061	0.91305349	1.050714	0.646233

ISSN: 2661-801X