Table 4.

Precision and accuracy of quality control samples

Analyte	Nominal concentration (ng/mL)	Accuracy (%bias)			Precision (%CV)			Inter-day
		Day 1	Day 2	Day 3	Day 1	Day 2	Day 3
8-iso-PGF2α	5	0.68	−7.55	0.74	1.94	3.94	5.76	1.59
	0.5	9.72	−5.40	−1.11	4.74	4.78	6.29	0.90
	0.07	14.46	−0.77	3.43	6.16	6.49	9.13	4.15
8-iso-15(R)-PGF2α	5	−2.56	−3.33	−1.90	2.98	0.92	4.67	3.22
	0.5	2.40	−2.23	3.27	6.45	8.49	7.53	1.15
	0.07	−3.68	−6.04	3.07	16.59	14.59	3.88	8.29
PGF2α	5	−1.28	−6.48	−1.67	1.56	6.49	2.84	2.40
	0.5	8.28	6.06	−1.67	5.98	6.75	8.95	1.10
	0.07	0.10	−12.02	16.24	12.18	12.71	15.41	8.88
15(R)-PGF2α	5	−0.32	−2.89	−9.47	2.45	5.79	4.84	1.67
	0.5	4.16	12.25	0.78	4.64	6.11	3.93	1.90
	0.07	−11.54	19.46	−8.23	8.97	9.68	3.12	9.12

Inter-day variation (15 replicates at each concentration)