Author(s): Bernardi RM, Frehlich PE, Bergold AM
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Abstract An RP-LC method was developed and validated for the determination of dabigatran etexilate in a capsule formulation. The LC method was carried out on a Zorbax C18 column (250 x 4.6 mm id). The mobile phase consisted of acetonitrile and a solution of triethylamine 0.1\%, pH 6.0 adjusted with phosphoric acid (65 + 35, v/v) at a flow rate of 1.0 mL/min. The diode array detector was set at 225 nm. The chromatographic separation was obtained with retention time of 6.31 min, and linearity was in the range of 10-70 microg/mL (R2 = 0.9991). The specificity and stability-indicating capability of the method was proven through degradation studies and showing that there was no interference from the excipients. The accuracy was 100.23\%, with an RSD of 1.34\%. The LOD and LOQ were 0.04 and 10 microg/mL, respectively. Moreover, method validation demonstrated acceptable results for robustness and a system suitability test. The proposed method was applied for the analysis of the capsules to ensure their therapeutic efficacy.
This article was published in J AOAC Int
and referenced in Journal of Chromatography & Separation Techniques