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  • Title: Development of a method for the determination of danofloxacin in plasma by HPLC with fluorescence detection.
    Author: Garcia MA, Solans C, Aramayona JJ, Rueda S, Bregante MA.
    Journal: Biomed Chromatogr; 2000 Apr; 14(2):89-92. PubMed ID: 10694701.
    Abstract:
    A simple and sensitive HPLC method has been developed for the determination of danofloxacin (DAN) in plasma. Sample preparations were carried out by adding phosphate buffer (pH 7.4, 0.1 M), followed by extraction with trichloromethane. DAN and the internal standard, sarafloxacin (SAR), were separated on a reversed-phase column, and eluted with aqueous solution-acetonitrile (80:20 v/v). The fluorescence of the column effluent was monitored at lambda(ex) = 338 and lambda(em) = 425 nm. The retention times were 2.80 and 4. 40 min for DAN and SAR, respectively. The method was shown to be linear from 1 to 1500 ng/mL (r(2) = 0.999). The detection and quantitation limit were 1 and 5 ng/mL, respectively. Mean recovery was determined as 80% by the analysis of plasma standards containing 150, 750 and 1500 ng/mL. Inter- and intra-assay precisions were 4.0% and 2.4%, respectively.
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