Table 2.

Precision results for EMT, TDF, and RPV.

Parameter	Sampling interval	EMT			TDF			RPV
		Amount present (mg)	(%)	%RSD	Amount present (mg)	(%)	%RSD	Amount present (mg)	(%)	%RSD
Within-day	0 hrs	200.77	100.38	0.252	299.72	99.90	0.355	24.42	97.70	1.592
	8 hrs	198.69	99.34	0.100	299.48	99.82	0.487	24.74	98.99	0.181
	16 hrs	198.37	99.18	0.021	299.78	99.92	0.026	24.75	99.03	0.442
Between days	1st day	198.94	99.47	0.063	299.68	99.89	0.025	24.91	99.64	0.136
	2nd day	198.60	99.30	0.047	299.54	99.84	0.011	24.73	98.93	0.207
	3rd day	197.66	98.83	0.025	298.94	99.64	0.107	24.57	98.31	0.643