Nominal Concentration Calculated Concentrations Between-run accuracy and Precision
Run 1 Run 2 Run 3 mean RE% RSD%
Morphine         3.994 -0.1% 0.7%
QC1 4.0 mg/mL 3.966 3.997 3.999
QC2 4.012 3.976 4.015
QC3 4.026 3.973 3.973
QC4 3.954 4.002 3.940
QC5 3.993 4.033 4.028
QC6 4.035 3.985 3.986
Within-run mean 3.998 3.994 3.990
Within-run RE% mean   -0.1% -0.1% -0.2%      
Within-run CV%   0.8% 0.6% 0.8%      
Ropivacaïne              
QC1 8.0 mg/mL 7.905 7.844 7.935 7.937 -0.8% 0.9%
QC2 7.971 7.859 8.037
QC3 7.965 7.858 7.978
QC4 7.859 7.834 7.994
QC5 7.994 7.946 7.962
QC6 7.988 7.874 8.063
Within-run mean 7.947 7.869 7.995
Within-run RE% mean   -0.7% -1.6% -0.1%
Within-run RSD%   0.7% 0.5% 0.6%      
Ziconotide              
QC1 1.0 μg/mL 1.021 0.987 0.879 0.985 -1.5% 5.0%
QC2 1.065 1.003 0.921
QC3 1.073 0.993 0.941
QC4 1.026 1.012 0.948
QC5 0.981 0.999 0.949
QC6 0.978 1.010 0.943
Within-run mean 1.024 1.001 0.930
Within-run RE% mean   2.4% 0.1% -7.0%
Within-run RSD%   3.9% 1.0% 2.9%      
Table 5: Within-run and between-run accuracy and precision obtained for QC samples.