Development and Validation of a Reversed-Phase HPLC Method for the Estimation of Zolpidem in Bulk Drug and Tablets

Table 2

Intra- and interday assay precision data (𝑛=10).

Standard concentration; (μg mL^−1)	Measured Concentration
	Intraday			Interday
	mg/tab	Recovery (%)	RSD (%)	mg/tab	Recovery (%)	RSD (%)
10.8	4.93	98.7	0.2	4.95	99.05	1.6
21.6	5.13	102.7	0.3	5.12	102.50	1.5
32.4	5.18	103.6	0.3	5.09	101.80	0.8

Nominal concentration of sample solution was 20 μg mL⁻¹ and tablets were 5 mg.