New Sensitive Kinetic Spectrophotometric Methods for Determination of Omeprazole in Dosage Forms

Table 5

Evaluation of the accuracy of the proposed initial rate and fixed time methods for determination of OMZ.

Method	Amount taken (𝜇gmL^−1)	Recovery (% ± RSD)^a
		Initial rate method	Fixed time method
Iodine	0.50	99.50 ±1.95	100.40 ±0.94
	1.50	98.80 ±1.08	99.80 ±0.25
	3.00	99.70 ±1.55	98.50 ±0.42
DDQ	2.00	98.60 ±1.45	99.60 ±1.84
	10.00	98.90 ±0.95	100.80 ±0.75
	20.00	100.30 ±0.75	100.20 ±1.25

a Recovery was calculated as the amount found/amount taken ×100. Values are mean ± RSD for five determinations.