Intra-assay (n = 7)

Added (ng/mL)

Measured (ng/mL)

Mean ± S.D.

C.V. (%)

Recovery (%)

5

10

20

40

5.20 ± 0.20

9.70 ± 0.39

19.2 ± 1.7

42.9 ± 4.3

3.8

4.0

8.9

10.0

104.0

97.0

96.0

107.3

Intra-assay (n = 7)

Added (ng/mL)

Measured (ng/mL)

Mean ± S.D.

C.V. (%)

Recovery (%)

5

10

20

40

4.68 ± 0.40

9.74 ± 0.67

20.4 ± 1.6

40.8 ± 3.1

8.5

6.9

7.8

7.6

93.6

97.4

102.0

102.0