. Author manuscript; available in PMC: 2009 Feb 1.

Published in final edited form as: J Chromatogr B Analyt Technol Biomed Life Sci. 2007 Nov 4;862(1-2):64–71. doi: 10.1016/j.jchromb.2007.10.044

Table 2.

Inter-day accuracy and precision of 4-HPR calibration standards (n = 3)

Nominal concentration (ng/ml)	Mean	STDEV	CV (%)	Accuracy (%)
0.5	0.50	0.02	3.90	100.73
1	0.99	0.09	8.73	99.03
2.5	2.49	0.06	2.21	99.47
5	4.91	0.08	1.71	98.13
10	10.15	0.28	2.80	101.47
25	25.13	0.85	3.38	100.53
50	49.00	1.51	3.09	98.00
100	102.00	1.73	1.70	102.00