Determination of a cyclic hexapeptide (L-743 872), a novel pneumocandin antifungal agent in human plasma and urine by high-performance liquid chromatography with fluorescence detection
- 10 October 1997
- journal article
- Published by Elsevier BV in Analytica Chimica Acta
- Vol. 352 (1-3), 299-307
- https://doi.org/10.1016/s0003-2670(97)00263-8
Abstract
A method based on high-performance liquid chromatography (HPLC) with fluorescence detection for the determination of a novel peptide antifungal agent, L-743 872 (I), in human plasma and urine is presented. Drug and internal standard were extracted from plasma and urine using diol solid-phase extraction columns and selectively eluted using a solution of trifluroacetic acid and ammonium hydroxide in methanol. Chromatography was performed on a wide pore C8 column and detection was by fluorescence. Loss of drug from urine due to adsorption to plastic surfaces was prevented by the addition of bovine serum albumin (0.5% final concentration). The range of the standard line was 10 to 1000 ng/ml for both matrices. The recovery of drug from plasma and urine was 76% and 84%, respectively. The assay was used to measure drug concentrations in human plasma and urine after the administration of intravenous (IV) doses of I.Keywords
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