Table 2.

Recovery and precision data for 1-OHP, 3-OHBaP, and 3-OHBaA.

	Spiked	Conc.	Recovery	Intraday precision	Interday precision
	ng/mL	ng/mL	n = 6, (%)	n = 6, (%)	n = 6, (%)
1-OHP	0.015	0.016	106.7	6.5	11.4
	0.076	0.080	105.6	5.1	4
	0.23	0.24	104.3	5.5	4
3-OHBaP	0.003	0.002	72.1	8.8	5.9
	0.015	0.012	80.2	4.5	7.3
	0.045	0.036	80.7	5.2	6
3-OHBaA	0.008	0.007	87.5	6.1	8.4
	0.038	0.036	94.7	5.8	6.7
	0.114	0.1135	99.6	3.9	1.8