Table 3.

Results obtained for reference materials used for quality control of whole blood element analysis.

Element (ng/g)	Seronorm trace elements whole blood L-1; lot: 1702821				Seronorm trace elements whole blood L-2; lot: 1702825
	Avg (N = 16)	Rsd (%)	Reference value	Reference range	Avg (N = 16)	Rsd (%)	Reference value	Reference range
Fe	347945	5.4	357000	NA	353431	5.6	350000	NA
Cu	568	5.0	640	590-700	875	5.6	980	890-1060
Mn	18.7	4.5	19.7	18.1–21.3	23.9	6.4	24.2	22.2–26.1
Zn	4327	8.2	4600	3800–5300	5823	3.8	5800	4800–6800
Se	66.0	6.1	69	54-84	137	4.3	144	113–175
Cr	<LOD	NA	0.77	0.61–0.92	11.78	8.8	10.1	8.0–12.0
Pb	9.72	2.5	10	7.9–12	290	1.4	303	272–334
Hg	1.50	7.9	1.57	1.25–1.88	14.9	2.5	16.6	13.3–20.0
Cd	0.32	20.5	0.28	0.23–0.34	5.21	3.5	5.1	4.1–6.1
As	2.12	8.6	2.1	1.7–2.5	11.7	3.7	12.2	9.8–14.7

avg, arithmetic mean; rsd, relative standard deviation; NA, not available; LOD, limit of detection.