Table 2.

Precision and accuracy (analysis with spiked plasma samples at three different concentrations).

Spiked plasma concentration (pg/ml)	Within-run (n = 6)			Between-run (n = 30)
	Concentration measured (n = 6) (pg/ml) (mean ± Sd.)	Precision (%CV)	Accuracy %	Concentration measured (n = 30) (pg/ml) (mean ± Sd.)	Precision (%CV)	Accuracy %
150.00	143.40 ± 3.20	2.20	95.60	143.50 ± 3.90	2.70	95.70
15000.00	14746.40 ± 338.40	2.30	98.30	14719.10 ± 248.30	1.70	98.10
35000.00	34935.20 ± 730.40	2.10	99.80	34699.20 ± 498.40	1.40	99.10