Concentration added (ng/ml)

Concentration found (mean ± SD) (ng/ml )

%CV

%Bias

0.98

0.96 ± 0.019

1.72

-1.49

2.94

2.91 ± 0.033

1.45

-1.25

400 

398.11 ± 1.390

1.40

-2.45

800

787.26 ± 1.993

1.89

-3.67