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

Table 5

Results of analysis of tablets by the proposed methods.

Tablet brand name	Label claim, mg/tablet	Found* (percent of label claim ± SD)
		Reference method	Method A	Method B
Zenflox-400**	20	99.82 ± 1.05	98.12 ± 1.14	101.2 ± 1.19
			𝑡=2.45	𝑡=1.95
			𝐹=1.15	𝐹=1.28
Ofloxin-400***	20	100.9 ± 1.10	101.9 ± 1.15	102.1 ± 1.13
			𝑡=1.40	𝑡=1.70
			𝐹=1.09	𝐹=1.06

∗Mean value of five determinations.
**Mankind Pharma Pvt Ltd., New Delhi, India; ***J. B. Chemicals and Pharmaceuticals Ltd., Mumbai, India.
The value of 𝑡 (tabulated) at 95% confidence level and for four degrees of freedom is 2.77.
The value of 𝐹 (tabulated) at 95% confidence level and for four degrees of freedom is 6.39.