Table 2.
The intraday and interday accuracy and precision analysis of ESR and DRS by derivative spectrophotometric and HPLC methods (n = 5).
| Method | Drug | Concentration (µg mL−1) |
Intraday Found ± RSD, % |
Interday Found ± RSD, % |
|---|---|---|---|---|
| Derivative spectrophotometric method | ESR | 0.63 | 0.63 ± 0.32 | 0.56 ± 1.07 |
| 2.50 | 2.44 ± 0.01 | 2.38 ± 0.50 | ||
| 5.00 | 5.06 ± 0.01 | 4.94 ± 0.45 | ||
| DRS | 1.00 | 0.89 ± 1.35 | 0.88 ± 2.39 | |
| 5.00 | 5.01 ± 1.94 | 4.93 ± 2.84 | ||
| 16.00 | 16.31 ± 1.04 | 16.28 ± 1.17 | ||
|
| ||||
| HPLC method | ESR | 0.63 | 0.62 ± 1.18 | 0.64 ± 1.03 |
| 1.25 | 1.26 ± 0.21 | 1.26 ± 0.79 | ||
| 5.00 | 5.00 ± 0.02 | 5.01 ± 0.08 | ||
| DRS | 0.16 | 0.16 ± 0.69 | 0.15 ± 2.67 | |
| 0.63 | 0.63 ± 1.90 | 0.62 ± 2.58 | ||
| 1.25 | 1.26 ± 1.75 | 1.24 ± 0.15 | ||