alexa Validated liquid chromatographic-fluorescence method for the quantitation of gemifloxacin in human plasma.
Pharmaceutical Sciences

Pharmaceutical Sciences

Pharmaceutica Analytica Acta

Author(s): AlHadiya BM, Khady AA, Mostafa GA

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Abstract A highly selective, sensitive and rapid high performance liquid chromatographic method has been developed and validated to quantify gemifloxacin in human plasma. The gemifloxacin and internal standard (ciprofloxacin) were extracted by ultrafiltration technique followed by injection into chromatographic system. Chromatographic separation was achieved on a reversed phase C(18) column with a mobile phase of acetonitrile:0.1\% trifluoroacetic acid (20:80, v/v) using isocratic elution (at flow rate 1 mL min(-1)). The analytes were detected at 269 and 393 nm for excitation and emission, respectively. The assay exhibited a linear range of 25-5000 ng mL(-1) for gemifloxacin in human plasma. The lower limit of detection was 10 ng mL(-1). The method was statistically validated for linearity, accuracy, precision and selectivity following FDA guidelines. The intra- and inter-assay coefficients of variation did not exceed 7.6\% deviation of the nominal concentration. The recovery of gemifloxacin from plasma was greater than 97.0\%. Stability of gemifloxacin in plasma was excellent with no evidence of degradation during sample processing (auto-sampler) and at least 3 months storage in a freezer at -70 °C. This validation method is applied for clinical study of the gemifloxacin in human volunteers. Copyright © 2010 Elsevier B.V. All rights reserved. This article was published in Talanta and referenced in Pharmaceutica Analytica Acta

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