Development and Validation of Spectrophotometric Methods for Simultaneous Estimation of Valsartan and Hydrochlorothiazide in Tablet Dosage Form

Table 4

Results of intraday and interday precision.

Drug	Amount taken; (𝜇g/mL)	Intra-day (𝑛=3)		Inter-day (𝑛=3)
		% RSD		% RSD
		Method 1	Method 2	Method 1	Method 2
VAL	38.4	0.368	1.589	1.122	1.055
	51.2	0.358	0.760	0.879	0.908
	64	0.276	1.076	0.793	0.799
	Mean	0.334	1.143	1.143	0.920
HCT	6	1.439	1.085	1.722	1.376
	8	1.674	1.059	1.227	1.360
	10	0.970	0.987	1.256	0.895
	Mean	1.361	1.044	1.044	1.210