Simultaneous Spectrophotometric Method for Determination of Emtricitabine and Tenofovir Disoproxil Fumarate in Three-Component Tablet Formulation Containing Rilpivirine Hydrochloride

Table 5

Precision results for EMT, TDF, and RPV.

Parameter	Sampling interval	EMT			TDF			RPV
		Amount present (mg)	Amount present (%)	%RSD	Amount present (mg)	Amount present (%)	%RSD	Amount present (mg)	Amount present (%)	%RSD
Within-day	0 hrs	0.1987	99.35	0.75	0.2991	99.71	0.90	0.0250	98.94	0.67
	8 hrs	0.2013	100.68	0.58	0.2970	99.03	0.54	0.0247	99.06	0.51
	16 hrs	0.1996	99.84	0.37	0.2967	98.91	0.32	0.0249	99.68	0.86
Between-day	1st day	0.1997	99.85	0.61	0.2966	98.87	0.74	0.0251	100.48	0.87
	2nd day	0.1996	99.83	0.78	0.2999	99.98	0.49	0.0249	99.71	0.89
	3rd day	0.1998	99.90	0.60	0.2955	98.50	0.36	0.0250	100.03	0.57