Research Article
Application of Cerium (IV) as an Oxidimetric Agent for the Determination of Ethionamide in Pharmaceutical Formulations
Table 5
Results of recovery experiment through standard-addition method.
| Method | Tablet studied | ETM in tablet (mg; μg/mL) | Pure ETM added (mg; μg/mL) | Total found (mg; μg/mL) | Pure ETM recovered (percent ± SD) |
| Titrimetry | Ethide 250 | 2.99 2.99 2.99 | 1.5 3.0 4.5 | 4.55 5.92 7.48 | 101.43 ± 1.42 98.97 ± 0.84 100.11 ± 0.68 |
| Spectrophotometry | Ethide 250 | 1.51 1.51 1.51 | 0.75 1.50 2.25 | 2.33 3.21 3.82 | 103.22 ± 2.44 104.82 ± 2.53 102.14 ± 2.35 |
|
|
Mean value of three determinations.
|