Table 1.

Intra- and inter-day precision and accuracy.

Nominal (ng/ml)	Mean (ng/ml)	SD	RSD (%)	%dev	n
Intra-day
50	51.0–58.5	0.79–2.80	1.3–5.2	2.1–17	5
120	119–131	4.2–8.1	3.5–6.3	−0.5–9.3	5
1500	1560–1646	35.6–160	2.2–10	4.0–9.7	5
17,000	16,660–18,220	709–1260	4.3–7.1	−2.0–7.2	5
Inter-day
50	54.16	3.21	5.9	8.3	30
120	127.2	6.7	5.3	6	30
1500	1607	88.7	5.5	7.1	30
17,000	17,593	1067	6.1	3.5	30

%dev: Deviation from nominal value.

RSD: Relative standard deviation.