Redox-Reaction Based Spectrophotometric Assay of Isoniazid in Pharmaceuticals

Table 4

Results of analysis of tablets by the proposed methods.

Tablets; analyzed	Label claim; (mg/tablet)	Found* (percent of label claim ± SD)
		Official method	Proposed methods
			Method A	Method B
Isokin-300	300	99.86±1.36	101.5±1.16	101.2±0.92
			𝑡=2.06	𝑡=1.83
			𝐹=1.37	𝐹=2.19

∗Mean value of five determinations.
Tabulated 𝑡-value at the 95% confidence level is 2.77.
Tabulated 𝐹-value at the 95% confidence level is 6.39.