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. Author manuscript; available in PMC: 2012 Jun 1.
Published in final edited form as: J Pharm Biomed Anal. 2011 Mar 5;55(3):487–493. doi: 10.1016/j.jpba.2011.01.040

Table 3.

Back-calculated concentrations of midazolam calibration standards in human plasma

Nominal Concentration (ng/ml) Calculated Concentration (ng/ml)
Mean SD %CV %Difference
Run 1 Run 2 Run 3
0.25 0.25 0.26 0.24 0.27 0.26 0.27 0.26 0.01 4.4 -3.6
0.5 0.51 0.50 0.42 0.50 0.48 0.49 0.48 0.03 6.6 3.6
0.98 0.90 0.99 0.94
1 1.06 1.03 0.99 0.06 5.7 1.2
5 3 8 7
2.5 2.59 2.56 2.41 2.39 2.58 2.59 2.52 0.09 3.7 -0.8
5 5.17 5.36 5.41 4.94 5.08 5.04 5.16 0.18 3.6 -3.3
10 10.7 10.5 9.45 9.36 10.2 10.2 10.1 0.6 5.4 -0.7
25 23.8 26.3 21.9 22.4 25.3 23.9 23.9 1.7 7.0 4.3
50 51.8 54.9 50.1 44.3 53.9 53.4 51.4 3.9 7.5 -2.8
100 95.4 108 90.8 102 102 109 101 7 7.0 -1.2