Nominal concentration (ng/mL) Repeatability (%CV) Intermediate precision (%CV) Accuracy(% MRE) Estimated concentration (ng/mL)
40.5 10.6 15.1 0.04 40.5
243.2 5.8 11.7 8.5 263.6
891.8 5.6 12.5 9.3 973.0
%CV - percentage coefficient of variation.  MRE- Percentage of mean relative error.
Table 4: Precision and accuracy in three concentration levels for citalopram.