Summary
A sensitive and reproducible method for the measurement of moxalactam in plasma and cerebrospinal fluid is described. Plasma proteins were removed by precipitation with ice-cold methanol at pH 5.6 and centrifugation. The supernatant was analysed by HPLC on a µ-Bondapack/phenyl column, with a mobile phase of acetonitrile/water/PIC Reagent A (20/80/1), and detection at 280 nm. The calibration curve was linear for plasma concentrations from 10 µg/ml to 60 µg/ml. Reproducibility was 4.7% (coefficient of variation) for within-day analysis and 13.8% for day-to-day analysis. Plasma concentrations in 9 moxalactam-treated patients with severe infections ranged from 0.9 µg/ml to 409 µg/ml. Individual pharmacokinetic parameters were calculated using a personal computer. In selected cases moxalactam concentrations were also determined in cerebrospinal fluid and tracheal aspirates.
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Nielsen, J., Karlaganis, G., von Hattingberg, H.M. et al. High performance liquid chromatographic determination of moxalactam in human plasma and cerebrospinal fluid. Eur J Clin Pharmacol 29, 225–229 (1985). https://doi.org/10.1007/BF00547427
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DOI: https://doi.org/10.1007/BF00547427