Table 7.
Robustness results for metformin hydrochloride according to peak area and retention time.
| Run # | Parameter | Condition | Metformin (30.00 μg/ml) |
Metformin (30.00 μg/ml) |
||
|---|---|---|---|---|---|---|
| Peak area Statistical | Analysis | Retention Statistical | Time Analysis | |||
| 1 | Column temperature (°C) | 30 | 57198117 | Mean = 56824654 | 1.194 | Mean = 1.1920 |
| 56967465 | 1.192 | |||||
| 56961649 | SD = 268221.6 | 1.191 | SD = 0.0011 | |||
| 56518237 | 1.192 | |||||
| 56534969 | % RSD = 0.4720 | 1.191 | % RSD = 0.0919 | |||
| 56767487 | 1.192 | |||||
| 2 | Flow rate (ml/min) | 0.9 | 50956415 | Mean = 50742178 | 1.066 | Mean = 1.0677 |
| 50894100 | 1.068 | |||||
| 50919486 | SD = 213868.2 | 1.068 | SD = 0.0008 | |||
| 50452485 | 1.068 | |||||
| 50537318 | % RSD = 0.4215 | 1.068 | % RSD = 0.0765 | |||
| 50693266 | 1.068 | |||||
| 3 | Injection value (μl) | 18 | 51695466 | Mean = 51373063 | 1.201 | Mean = 1.2020 |
| 51315331 | 1.202 | |||||
| 51571848 | SD = 233477.1 | 1.202 | SD = 0.0006 | |||
| 51046812 | 1.202 | |||||
| 51234057 | % RSD = 0.4545 | 1.203 | % RSD = 0.0526 | |||
| 51374862 | 1.202 | |||||
| 4 | pH of M.P. | 3.5 | 57035010 | Mean = 56675050 | 1.200 | Mean = 1.2000 |
| 56583688 | 1.200 | |||||
| 56944343 | SD = 257438.9 | 1.201 | SD = 0.0006 | |||
| 56373615 | 1.200 | |||||
| 56524280 | % RSD = 0.4542 | 1.200 | % RSD = 0.0527 | |||
| 56589363 | 1.199 | |||||
Note. M.P. = Mobile Phase.