| Medicine | Mass of unknown sample | Mass of clavulanic acid (CA) per pill | Mean amount of clavulanic acid (CA) (in mg) | SD(a) | RSD (b) (%) | Relative deviation (%)© | USP requirement |
|---|
| Drug1.1 | 1478.1 | 150.452 | 147.44 | 2.91 | 1.97 | 17.95 | 90–120% |
| Drug1.2 | 1451.1 | 147.259 |
| Drug1.3 | 1471.8 | 144.623 |
| Drug2.1 | 1477.9 | 146.529 | 148.29 | 1.69 | 1.14 | 18.63 | 90–120% |
| Drug2.2 | 1544.8 | 148.447 |
| Drug2.3 | 1548.8 | 149.912 |
| Drug3.1 | 1463.0 | 141.884 | 144.37 | 2.56 | 1.77 | 15.5 | 90–120% |
| Drug3.2 | 1459.1 | 144.227 |
| Drug3.3 | 1474.1 | 147.013 |
| Drug4.1 | 1501.6 | 150.575 | 151.64 | 1.39 | 0.92 | 21.31 | 90–120% |
| Drug4.2 | 1501.3 | 151.137 |
| Drug4.3 | 1512.2 | 153.226 |
| Drug5.1 | 1513.3 | 147.668 | 147.73 | 0.88 | 0.6 | 18.18 | 90–120% |
| Drug5.2 | 1519 | 146.885 |
| Drug5.3 | 1532.6 | 148.665 |
- a: SD = \( \sqrt{\frac{\sum \left(x-\overline{x}\right)}{n}} \) b: RSD = \( \frac{SD\ }{\overline{X}}\times 100 \) c: RD = \( \frac{experimental- expected}{expected} \)
