Captopril concentration in whole blood (ng/ml)

Mean concentration found ±SD
(ng/ml) (n=6)

Precision
(% RSD)

Accuracy (%bias)

Extraction efficiency ±SD
(%)

400

406 ± 45

11.13

1.5

92.3 ± 10.3

100

98 ± 4

4.4

-2.0

89.4 ± 4.0

50

50 ± 3

6.5

0

92.2 ± 6.0