. Author manuscript; available in PMC: 2008 Aug 8.

Published in final edited form as: Biomarkers. 2008 Mar;13(2):160–183. doi: 10.1080/13547500701775563

Table III.

Study variable means, within-run and between-run imprecision based on quality control materials expressed as percentage coefficient of variation (%CV).

	Mean	Within%CV (between%CV)	Mean	Within%CV (between%CV)	Mean	Within%CV (between%CV)
Vitamins and micronutrients	SRM 968 C1		SRM 968 C2		In-house QC
Retinol (μg ml⁻¹)	0.74	3.01 (6.09)	0.44	2.96 (5.93)	0.52	6.17 (6.03)
δ-Tocopherol (μg ml⁻¹)	0.05	21.23 (40.78)	0.58	8.85 (14.27)	0.03	71.85 (61.90)
γ-Tocopherol (μg ml⁻¹)	3.71	2.15 (5.49)	1.65	2.29 (5.26)	1.96	4.55 (7.54)
α-Tocopherol (μg ml⁻¹)	6.88	2.34 (4.49)	14.96	2.51 (5.52)	13.52	4.99 (5.83)
Lutein (μg ml⁻¹)	0.07	5.55 (5.93)	0.08	5.00 (9.16)	0.11	6.55 (7.75)
β-Cryptoxanthin (μg ml⁻¹)	0.06	2.89 (8.00)	0.03	9.68 (9.69)	0.07	5.95 (9.13)
β-Carotene (μg ml⁻¹)	0.14	6.52 (7.53)	0.35	6.66 (8.74)	0.17	5.27 (9.86)
Lycopene (μg ml⁻¹)	0.35	5.59 (8.25)	0.48	5.99 (8.72)	0.43	7.63 (9.02)
					Heparin/DTT plasma
Vitamin C* (mg dl⁻¹)					1.12	6.88 (9.60)
Lipids and lipid peroxides	EDTA plasma QC1		EDTA plasma QC2
TBARS (μmol l⁻¹)	2.0	8.10 (8.29)	1.10	8.20 (8.90)
13-HODE (μmol l⁻¹)	0.105	9.20 (11.20)
9-HODE (μmol l⁻¹)	0.120	9.00 (9.50)
13-HpODE (μmol l⁻¹)	0.037	8.00 (10.50)
9-HpODE (μmol l⁻¹)	0.053	10.40 (10.30)
Linoleic (μg ml⁻¹)	225	4.70 (4.40)
Plasma antioxidant enzymes	EDTA plasma QC1		EDTA plasma QC2
pGPx (U l⁻¹)	474	3.30 (4.58)
Serum antioxidant enzymes	Serum QC1		Serum QC2
PONa (kU l⁻¹)	106.7	1.20 (1.20)	124.3	0.90 (1.10)
PONp (U l⁻¹)	115.1	1.40 (1.60)	457.2	1.20 (1.30)
Erythrocyte antioxidant enzymes	Erythrocyte lysate QC
eSOD (U mg⁻¹ Hgb)	4.74	4.64 (8.02)
eGSHR (U g⁻¹ Hgb)	3.57	3.65 (10.64)
eGPx (U g⁻¹ Hgb)	36.38	5.01 (7.92)

For definitions see footnote for Table II.