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  • Title: Determination of marbofloxacin in plasma samples by high-performance liquid chromatography using fluorescence detection.
    Author: Garcia MA, Solans C, Aramayona JJ, Rueda S, Bregante MA.
    Journal: J Chromatogr B Biomed Sci Appl; 1999 Jun 11; 729(1-2):157-61. PubMed ID: 10410938.
    Abstract:
    A simple and sensitive HPLC method has been developed for the determination of marbofloxacin (MAR) in plasma. Sample preparations were carried out by adding phosphate buffer (pH 7.4, 0.1 M), followed by extraction with trichloromethane. MAR and the internal standard, enrofloxacin (ENR), were separated on a reversed-phase column and eluted with aqueous solution-acetonitrile (80:20). The fluorescence of the column effluent was monitored at lambda(ex) = 338 and lambda(em) = 425 nm. The retention times were 2.20 and 3.30 min for MAR and ENR, respectively. The method was shown to be linear from 15 to 1500 ng/ml (r2 = 0.999). The detection limit was 15 ng/ml. Mean recovery was determined as 90% by the analysis of plasma standards containing 150, 750, and 1500 ng/ml. Inter- and intra-assay precisions were 3.3% and 2.7%, respectively.
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