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Calibration curves, correlation coefficients, linear ranges, and LLOQs of the analytes.
| Compounds | Calibration curve | r | Linear range (ng/mL) |
LLOQ (ng/mL) |
|---|---|---|---|---|
| metoprolol tartrate | y = 1.1056 x + 0.0057 | 0.9962 | 8.0-4000.0 | 0.1 |
| hydrochlorothiazide | y = 0.0536 x + 0.0012 | 0.9906 | 10.0-5000.0 | 5.0 |
| nifedipine | y = 0.7370 x + 0.0021 | 0.9924 | 2.0-1000.0 | 1.0 |
| valsartan | y = 0.3144 x + 0.0030 | 0.9958 | 20.0-10000.0 | 0.1 |
