Research Article
Estimation of Tadalafil Using Derivative Spectrophotometry in Bulk Material and in Pharmaceutical Formulation
| Drug | Methods | Initial amount
g/mL | Amount added
g/mL | Amount recovered
g/mL, | % Recovered | % RSD |
| Tadalafil | A | 10 | 8 | 18.07 | 100.91 | 0.52 | 10 | 10 | 20.16 | 101.63 | 0.65 | 10 | 12 | 22.13 | 101.11 | 0.47 | B | 10 | 8 | 18.06 | 100.75 | 0.89 | 10 | 10 | 20.10 | 101.06 | 1.22 | 10 | 12 | 22.06 | 100.50 | 0.29 | C | 30 | 24 | 54.13 | 100.54 | 0.18 | 30 | 30 | 60.13 | 100.44 | 0.16 | 30 | 36 | 66.06 | 100.16 | 0.19 | D | 30 | 24 | 54.11 | 100.48 | 0.16 | 30 | 30 | 60.10 | 100.35 | 0.12 | 30 | 36 | 66.07 | 100.21 | 0.29 |
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: number of estimations.
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