Research Article
Estimation of Tadalafil Using Derivative Spectrophotometry in Bulk Material and in Pharmaceutical Formulation
Table 3
Precision studies.
| Drug | Methods | Concentration
g/mL | Intra-day
| % RSD | Inter-day
| % RSD |
| Tadalafil | A | 10 | 9.93 | 0.32 | 9.95 | 0.31 | 20 | 20.20 | 0.77 | 20.25 | 1.17 | 40 | 40.71 | 0.10 | 40.66 | 0.07 | B | 10 | 9.87 | 0.67 | 9.90 | 0.40 | 20 | 20.03 | 0.06 | 20.05 | 0.13 | 40 | 40.07 | 0.06 | 40.17 | 0.14 | C | 30 | 30.08 | 0.12 | 30.33 | 1.32 | 40 | 40.12 | 0.11 | 40.07 | 0.08 | 60 | 60.07 | 0.07 | 60.11 | 0.11 | D | 30 | 29.73 | 1.69 | 30.02 | 1.30 | 40 | 39.91 | 0.94 | 39.68 | 1.41 | 60 | 59.48 | 1.03 | 59.93 | 1.11 |
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: number of estimations.
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