Simple and Selective Spectrophotometric Determination of Ofloxacin in Pharmaceutical Formulations Using Two Sulphonphthalein Acid Dyes

Table 3

Evaluation of intraday and interday accuracy and precision.

Method	OFX taken (µg/mL)	Intraday accuracy and precision			Interday accuracy and precision
		OFX found (µg/mL)	% RE	% RSD	OFX found (µg/mL)	% RE	% RSD
Method A	8.00	7.83	2.13	1.02	7.76	2.98	1.18
	12.0	11.77	1.92	1.14	11.68	2.66	1.29
	16.0	15.61	2.44	1.22	15.50	3.11	1.31
Method B	8.00	7.85	1.88	1.17	7.77	2.87	1.24
	12.0	11.71	2.45	1.04	11.64	3.00	1.13
	16.0	15.68	1.97	1.21	15.60	2.50	1.29

RE: relative error and RSD: relative standard deviation.