Key result
Two new, rapid, precise, accurate and specific chromatographic methods (RP-LC and HPTLC) were successfully developed for the simultaneous determination of olmesartan medoxomil and hydrochlorothiazide.
The study provides rapid, precise, and accurate RP-LC and HPTLC methods for the simultaneous determination of olmesartan medoxomil and hydrochlorothiazide in combined tablet dosage forms.
Enables efficient quality control of olmesartan-HCTZ tablets; leaves open routine adoption pending independent multi-lab validation.
Two new, rapid, precise, accurate and specific chromatographic methods were described for the simultaneous determination of olmesartan medoxomil and hydrochlorothiazide in combined tablet dosage forms. The first method was based on reversed phase liquid chromatography using an Eurosphere 100 RP C18 column (250 x 4.6 mm ID, 5 mum). The mobile phase was methanol-0.05% o-phosphoric acid (60:40 v/v) at a flow rate of 1.0 mL min(-1). Commercially available tablets and laboratory mixtures containing both drugs were assayed and detected using a UV detector at 270 nm. The second method involved silica gel 60 F(254) high performance thin layer chromatography and densitometric detection at 254 nm using acetonitrile-ethyl acetate-glacial acid (7:3:0.4 v/v/v) as the mobile phase. Calibration curves ranged between 200-600 and 125-375 ng spot(-1) for olmesartan and hydrochlorothiazide, respectively.
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Bari et al. (2009) studied this question. RP-LC and HPTLC methods was evaluated on Simultaneous determination of olmesartan medoxomil and hydrochlorothiazide. Two new, rapid, precise, accurate and specific chromatographic methods (RP-LC and HPTLC) were successfully developed for the simultaneous determination of olmesartan medoxomil and hydrochlorothiazide.
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