Table II.
Precision and Accuracy of the Method for Determination of Diclofenac Sodium (mean ± SD, n = 6)
| Intra-day | Inter-day | ||||||
|---|---|---|---|---|---|---|---|
| Method | Added (μg/ml) | Found ± SD | Precision% RSD | Accuracy | Found ± SD | Precision% RSD | Accuracy |
| HPLC | 5 | 5.47 ± 0.43 | 7.86 | 9.4 | 4.85 ± 0.16 | 3.29 | −3.00 |
| 90 | 87.50 ± 4.36 | 4.98 | −2.77 | 92.51 ± 3.31 | 3.57 | 2.78 | |
| 180 | 171.40 ± 3.97 | 2.31 | −4.77 | 174.62 ± 3.77 | 2.15 | −2.98 | |
SD standard deviation of six replicate determinations, RSD relative standard deviation
Average of six replicate determinations, accuracy: (% relative error) (found − added)/added × 100