TABLE 2.

Intra- and inter-day accuracies and precision.

Analyte	Concentration (ng/ml)	Intra-day		Inter-day
		Mean accuracy (%diff)	Precision (%CV)	Mean accuracy (%diff)	Precision (%CV)
Cyclophosphamide	5	−10.1%–12.9%	9.74	−13.9%–12.9%	8.85
	15	−13.4%–14.0%	9.91	−14.7%–14.0%	8.58
	24.000	2.75%–13.9%	4.19	−14.9%–14.2%	8.27
	45.000	−8.29%–9.96%	7.01	−9.82%–12.3%	6.14
4-OHCP	2.5	−10.1%–9.48%	8.34	−14.7%–19.1%	9.12
	7.5	−6.73%–14.5%	7.78	−13.5%–14.9%	8.77
	400	−3.05%–10.1%	6.16	−11.8%–12.6%	6.94
	750	−13.8%–10.8%	9.24	−13.8%–10.8%	7.29