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| Solvent | Equation | r2 | Precision% (Intraday) | Precision% (Interday) | Accuracy% |
| Water: Ethanol (30:70) | y = 0.015x+0.009 | 0.999 | 99.6 ± 0.2 | 98.6 ± 1.2 | 98.2 ± 2.9 |
| Phosphate buffer pH 7.4 | y = 0.018x-0.014 | 0.999 | 98.4 ± 1.9 | 98.1 ± 1.4 | 97.7 ± 2.8 |
