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Interday precision over four days (% relative standard deviation (% RSD)) and accuracy (% error) of the LC-MS/MS assay for quantification of lansoprazole (n = 20 for each concentration).
| Concentration of lansoprazole added (μg/mL) | Concentration of lansoprazole found (μg/mL) | % Relative standard deviation | % Error |
|---|---|---|---|
| 5 | 5.07 + 0.18 | 3.55 | 1.18 |
| 10 | 10.13 + 0.20 | 1.99 | 1.34 |
| 15 | 14.84 + 0.58 | 3.93 | 1.06 |
| 20 | 20.56 + 0.46 | 2.23 | 2.81 |
| 25 | 24.44 + 0.89 | 3.63 | 2.23 |
