Abstract
A method of analysis of mometasone furoate in pharmaceutical formulations and biological fluids is necessary to study the degradation kinetics and determine its stability. A simple high-performance liquid chromatographic method was developed for simultaneous determination of mometasone furoate and its degradation products in human plasma. Plasma (0.5 ml) was extracted with dichloromethane after addition of the internal standard, dexamethasone 21-acetate. Separation was achieved on a Beckman C(8) column with UV detection at 248 nm. The calibration curve was linear ranging from 0.2 to 100 microg/ml. The mean extraction efficiency was >86%. Precision of the assay was <10% (CV), and was within 10% at the limit of quantitation (0.2 microg/ml). Bias of the assay was lower than 7%. The limit of detection was 50 ng/ml for a 0.5-ml sample. The assay was applied successfully to the in vitro kinetic study of degradation of mometasone furoate in human plasma and simulated biological fluids.
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