Abstract
A sensitive and rapid flow-injection chemiluminescence (CL) method has been developed for the determination of gatifloxacin in pharmaceutical preparations and biological samples. The method is based on the enhancing effect of gatifloxacin on CL emission generated by the interaction of Ce (IV) in sulphuric acid and sodium hyposulphite (Na2S2O4) sensitized by sodium dodecyl benzene sulfonate (SDBS). Strong CL emission was observed when gatifloxacin was injected into the Ce (IV) in sulphuric acid and Na2S2O4 solution incorporated with SDBS in a flow-cell. Several experimental parameters affecting the CL reaction were investigated and optimized systematically. Under the optimum conditions, it was found that the CL intensity is proportional to the concentration of gatifloxacin in the range of 1.12 × 10−11–4.40 × 10−9 g mL−1 with a co-relation coefficient of 0.9994. The limit of detection was found to be 4.87 × 10−12 g mL−1 and the relative standard deviation (RSD, n = 7) was 1.8% for 4 × 10−8 g mL−1 of GFLX. The proposed method offers higher sensitivity, wide linear range and better stability without requiring sophisticated instrumentation. Thus, the proposed method has been successfully applied to the determination of gatifloxacin in pharmaceuticals, serum and human urine.
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This research was supported by Kyungpook National University Research Fund, 2009.
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Kamruzzaman, M., Alam, AM., Ferdous, T. et al. Ultrasensitive Study of Gatifloxacin Based on Its Enhancing Effect on the Cerium (IV)-Sodium Hyposulfite Chemiluminescence Reaction in a Micellar Medium. J Fluoresc 21, 1539–1545 (2011). https://doi.org/10.1007/s10895-011-0842-2
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DOI: https://doi.org/10.1007/s10895-011-0842-2