| Sample | Glycopyrrolate | Methylparaben | Propylparaben | |||
| Analyst-1 | Analyst -2 | Analyst -1 | Analyst -2 | Analyst -1 | Analyst -2 | |
| 01 | 99.5 | 99.6 | 99.1 | 99.5 | 99.5 | 98.0 |
| 02 | 98.7 | 99.4 | 99.9 | 98.9 | 97.9 | 99.8 |
| 03 | 98.3 | 99.0 | 98.9 | 98.9 | 97.9 | 97.8 |
| 04 | 98.1 | 99.0 | 98.7 | 99.0 | 99.8 | 97.9 |
| 05 | 99.6 | 99.3 | 98.8 | 97.4 | 99.0 | 99.8 |
| 06 | 98.6 | 99.0 | 99.9 | 99.0 | 98.4 | 98.9 |
| Average | 98.8 | 99.2 | 98.2 | 98.7 | 98.8 | 98.7 |
| %RSD | 0.6 | 0.2 | 0.5 | 0.7 | 0.8 | 0.9 |