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

Figure 3

The absorbance-time curve for the reaction of OMZ at 25±2^∘C with (a) iodine (0.20 mg mL⁻¹) at 362 nm; the concentrations of OMZ were 1.45×10⁻⁶ (⋄), 2.90×10⁻⁶ (◆), 4.35×10⁻⁶ (▵), 5.80×10⁻⁶ (▴), 7.25×10⁻⁶ (°), and 8.70×10⁻⁶M (•), and (b) DDQ (0.40 mg mL⁻¹) at 418 nm; the concentrations of OMZ were 0.73×10⁻⁵ (●), 1.45×10⁻⁵ (°), 2.90×10⁻⁵ (▴), 5.80×10⁻⁵ (▵), 8.70×10⁻⁵ (◆), and 1.15×10⁻⁴M (⋄).

(a)

(b)