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Title: High-performance liquid chromatography with time-programmed fluorescence detection for the quantification of Levofloxacin in human plasma and cerebrospinal fluid in adults with tuberculous meningitis
Authors: Pham Van Toi
Thomas Pouplin
Nguyen Duc Khanh Tho
Pham Nguyen Phuong
Tran Thi Hong Chau
Nguyen Thuy Thuong Thuong
Dorothee Heemskerk
Tran Tinh Hien
Guy E. Thwaites
Nuffield Department of Clinical Medicine
Mahidol University
Keywords: Biochemistry, Genetics and Molecular Biology;Chemistry
Issue Date: 1-Sep-2017
Citation: Journal of Chromatography B: Analytical Technologies in the Biomedical and Life Sciences. Vol.1061-1062, (2017), 256-262
Abstract: © 2017 The Authors An accurate and reliable high-performance liquid chromatography with time-programmed fluorescence detection was developed and validated to measure levofloxacin in human plasma and cerebrospinal fluid (CSF). After solid phase extraction process using Evolute®ABN 96 fixed well plate; levofloxacin and internal standard-enoxacin were separated using a mobile phase consisting of phosphate buffer 10 mM with 0.025% triethylamine pH 3.0 - acetonitrile (88:12, v/v) on a Purosphere RP-8e column (5 μm, 125 × 4.0mm) at a flow rate of 1.2 mL/min at 35 °C. The excitation/emission wavelengths were set to 269/400 nm and 294/500 nm, for enoxacin and levofloxacin, respectively. The method was linear over the concentration range of 0.02 to 20.0 μg/mL with a limit of detection of 0.01 μg/mL. The relative standard deviation of intra-assay and inter-assay precision for levofloxacin at four quality controls concentrations (0.02, 0.06, 3.0 and 15.0 μg/mL) were less than 7% and the accuracies ranged from 96.75% to 101.9% in plasma, and from 93.00% to 98.67% in CSF. The validated method was successfully applied to quantify levofloxacin in a considerable quantity of plasma (826) and CSF (477) samples collected from 232 tuberculous meningitis patients, and the preliminary intensive pharmacokinetics analysis from 14 tuberculous meningitis patients in Vietnam is described in this paper.
ISSN: 1873376X
Appears in Collections:Scopus 2016-2017

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