Table 2.

Intra-day and inter-day precision and accuracy at different concentrations.

	Nominal Concentration (ng/mL)	Measured (ng/mL)	RSD (%) *	Accuracy (%)
Intra day (n = 5)	10	10.76 ± 0.30	3.2	107.5
	20	19.64 ± 0.79	4.9	98.2
	40	38.87 ± 1.10	2.8	97.1
	80	80.46 ± 1.88	2.4	100.5
Inter day (n = 5)	10	10.22 ± 0.40	3.9	102.2
	20	19.44 ± 0.61	3.2	97.2
	40	39.11 ± 1.86	4.7	97.8
	80	78.79 ± 1.80	2.9	98.4

* Relative Standard Deviation.