title: [Fluorescence spectrometric determination of fleroxacin by charge-transfer reaction].
abstract: A simple and reliable fluorescence spectrometric method for the determination of fleroxacin (FLX) has been developed based on the charge-transfer reaction. The charge-transfer complex which formed between fleroxacin as the donor and 2, 3-dichloro-5, 6-dicyano-1, 4-benzoquinone (DDQ) as the acceptor has been studied by fluorimetry. Experiment shows that FLX is reacted with DDQ in a mixture of acetone and methanol at 30 degrees C for 30 min and a complex is formed. The composition of the charge-transfer complex is found to be 1:1 by Bent-French and curved intersection methods. The linear dynamic range is 0.4-8.4 mg.L-1, the detection limit is 0.1 mg.L-1 and the recovery of FLX is 96.6%-99.2%. At last, the charge-transfer reaction mechanism was explored. The method has been applied to the determination of FLX in tablets with satisfactory results.
authors.affiliation: Center of Analysis and Test, Shanxi Normal University, Linfen 041004, China.
authors.forename: Li-ming
authors.initials: LM
authors.lastname: Du
authors.forename: Zhe-feng
authors.initials: ZF
authors.lastname: Fan
authors.forename: Rui-feng
authors.initials: RF
authors.lastname: Zhang
mesh_terms: D000890:Anti-Infective Agents / Q000032:analysis*; D016227:Benzoquinones; D004579:Electron Transport; D016576:Fleroxacin / Q000032:analysis*; D012680:Sensitivity and Specificity; D013050:Spectrometry, Fluorescence / Q000379:methods*
chemical_list: D000890:Anti-Infective Agents; D016227:Benzoquinones; D016576:Fleroxacin