| Method | Source of uncertainty | ±Value | distribution | Sensitivity coefficient, ci |
| Method 3 | Area of unknown | 34159.42 | Normal | 9.66308 × 10−5 |
| Area of IS | 57175.05 | Normal | −3.00321 × 10−5 | |
| Slope | 0.0026 | Normal | −377.87827 | |
| Intercept | 0.0015 | Normal | −383.308 | |
| Concentration of IS | 1.64 | Normal | 0.99 | |
| The uc | 3.07 |
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| Average dil factor | 4040.23 |
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| uc × dil Factor/1000 | 12.40 mg/kg |
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