RK (μg/mL)

Measured (μg/mL, mean ± S.D., n = 5)

C.V. (%)

Recovery (%)

Intra-day assay

0.2

1

10

0.192 ± 0.011

0.982 ± 0.033

10.2 ± 0.3

5.7

3.4

2.9

96.0

98.2

102.0

Inter-day assay

0.2

1

10

0.186 ± 0.015

0.987 ± 0.045

10.4 ± 0.6

8.1

4.6

5.8

93.0

98.7

104.0