Table 1.

The accuracy and precision from calibration curves^a.

Nominal conc. (ng/mL)	Mean accuracy (%)	Precision (%RSD)
0.50	102.7	2.9
1.00	93.0	3.4
2.00	104.6	7.9
8.00	97.0	11.0
10.0	96.2	6.1
20.0	100.5	2.5
30.0	102.8	7.5
40.0	103.3	6.7
50.0	96.1	4.3

^an=6.