Abstract
A simple, rapid, cost-effective and green high-performance liquid chromatographic assay for determination of capecitabine in human plasma using a C18 reversed-phase analytical column was developed and validated. The separation was conducted by means of a mobile phase composed of formic acid solution (pH=3): ethanol (55:45) running at a flow-rate of 1.0mLmin-1 with UV detection at 310 nm. The column temperature was set at 50 °C. Sample preparation involved protein precipitation by zinc sulfate-ethanol solution. This method is consistent with a high recovery of capecitabine in human plasma ranging from 95.98 to 102.50 %. The calibration curves were linear over concentration range of 0.05-10.00 μg mL-1 (r2 > 0.9999). Between- and within-day variability was less than 15 % and the bias was within ±15 %. This validated method was successfully applied to a pharmacokinetic study enrolling seven Iranian cancer patients after administration of a morning oral dose of 1500 mg.
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