alexa High-performance liquid chromatographic determination of glibenclamide in human plasma and urine.
Biochemistry

Biochemistry

Biochemistry & Analytical Biochemistry

Author(s): Emilsson H, Sjberg S, Svedner M, Christenson I

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Abstract A selective and sensitive high-performance liquid chromatographic method for determination of intact glibenclamide in human plasma or urine has been developed. With glibornuride as internal standard, acid-buffered plasma or urine was extracted with benzene. The organic layer was evaporated and the residue was dissolved in equilibrated mobile phase (acetonitrile-phosphate buffer 0.01 M pH 3.5, 50:50). An aliquot of 20 microliters was chromatographed on a Spherisorb ODS reversed-phase column, and quantitation was achieved by monitoring the ultraviolet absorbance at 225 nm. The response was linear (0-1000 ng/ml) and the detection limit was 5-10 ng/ml in plasma or urine. The within-assay variation was less than or equal to 10\%. No interferences from metabolites or endogenous constituents could be noted. The utility of the method was demonstrated by analysing glibenclamide in samples from diabetic subjects on therapeutic doses of the drug.
This article was published in J Chromatogr and referenced in Biochemistry & Analytical Biochemistry

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