Compound Concentration
(ng/mL)
Extracted plasma (ng/mL) N=6 Extracted urine (ng/mL) N=6 Standard in acetonitrile (ng/mL) N=6
Testosterone 0.25 (LLOQ) 0.248 0.241 0.250
1 0.977 0.952 0.957
2 2.019 2.005 2.053
8 8.089 8.129 8.455
Epitestosterone 1 1.002 1.094 0.992
2 2.051 1.961 1.977
8 8.038 8.122 8.110
Table 4: Matrix effect of plasma and urine on spiked testosterone and epitestosterone compared with standard concentrations in acetonitrile.
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