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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)

Capillary electrophoresis analysis of fosfomycin in biological fluids for clinical pharmacokinetic studies.

A feasible capillary zone electrophoresis (CZE) method with indirect UV and contactless conductivity detection was developed for the determination of fosfomycin, an antibiotic, in human plasma and microdialysis samples. Samples were collected from test persons during a clinical trial. The background electrolytes used consisted of 25 mM benzoic acid and 0.5 mM hexadecyltrimethylammonium bromide, adjusted with tris(hydroxymethyl)aminomethane solution to pH 6.95 for plasma, and to pH 8.05 for microdialysis samples. CZE separations of the anionic analyte were carried out with reversed electroosmotic flow directed towards the anode. The limit of detection was between 0.6 and 2 microg/mL, depending on the matrix and the detection method. No sample preparation was needed for microdialysis samples; for plasma samples, proteins were precipitated with methanol (1+2, v+v), and the supernatant was analyzed. The yield determined with spiked samples was about 100%, the reproducibility of the entire method, expressed by the RSD% of three independent determinations of fosfomycin in triplicate after spiking Ringer's solutions and plasma samples, respectively, was better than 8%. The method is thus well-suited for clinical studies for the determination of the antibiotic in biological fluids.[1]


  1. Capillary electrophoresis analysis of fosfomycin in biological fluids for clinical pharmacokinetic studies. Petsch, M., Mayer-Helm, B.X., Sauermann, R., Joukhadar, C., Kenndler, E. Electrophoresis (2004) [Pubmed]
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