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| LoB | calculated concentration based on the mean zero calibrator signal + 1.645 × the standard deviation (SD) of the zero calibrator |
| LLoD | calculated concentration based on the signal + 1.645 × SD (lowest calibrator) above the LoB |
| LLoQ | calculated concentration based on the signal + 10 × SD (blank) above the zero calibrator |
| ULoQ | calibrator concentration at the upper limit of the linear range on a logarithmic scale |
