Application of a Stability-Indicating HPTLC Method for Simultaneous Quantitative Determination of Olmesartan Medoxomil and Hydrochlorothiazide in Pharmaceutical Dosage Forms

Table 2

Results of precision studies of proposed method.

Drug concentration (ng/band)	Intraday precision		Interday precision
	Calculated amount^a  ± SEM (ng/band)	% RSD	Calculated amount^a  ± SEM (ng/band)	% RSD
OLM
80	79.12±0.20	0.44	82.41±0.47	0.98
320	323.10±0.24	0.13	325.60±0.90	0.48
480	485.62±0.94	0.34	483.13±1.36	0.38
HTZ
25	26.15±0.15	0.99	25.93±0.26	1.73
100	102.36±0.29	0.50	101.95±0.64	1.08
150	156.91±0.71	0.78	153.12±1.53	1.08

^aMean of three replicates, RSD: relative standard deviation, SEM: standard error mean.