Determination of norfloxacin in rat liver perfusate using capillary electrophoresis with laser-induced fluorescence detection.
A capillary zone electrophoresis method has been developed for the direct determination of norfloxacin in the physiological perfusate of isolated rat liver. Norfloxacin and the internal standard triamterene were detected using laser-induced fluorescence (LIF) detection with the excitation and emission wavelength of 325 and 435 nm, respectively. The background electrolyte (BGE) was 50 mM phosphate buffer (pH 4.6). The effect of pH and concentration of BGE on the electrophoretic migration and fluorescence response of analytes were examined. Calibration curves were linear over a wide range of 0.01-100 microg/mL. The limit of quantitation was 0.01 microg/mL. The intra- and inter-day relative standard deviation was 3.7%, or less, and the accuracy was 93.2% of the nominal concentration. No endogenous substances were found to interfere. The method was used to characterize the steady-state and transient pharmacokinetics of norfloxacin in the rat liver.
Cheng
Ching-Ling
CL
Department of Pharmacy, Chia-Nan University of Pharmacy and Science, No. 60, Section 1, Erh-Jen Road, Jen-Te, Tainan 71710, Taiwan. hccl@mail.chna.edu.tw
Fu
Chia-Hung
CH
Chou
Chen-Hsi
CH
D000818:Animals; D000900:Anti-Bacterial Agents / Q000032:analysis*; D002138:Calibration; D019075:Electrophoresis, Capillary / Q000379:methods*; D007834:Lasers; D008099:Liver / Q000737:chemistry*; D008297:Male; D009643:Norfloxacin / Q000032:analysis*; D010477:Perfusion; D051381:Rats; D017207:Rats, Sprague-Dawley; D012015:Reference Standards; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity; D013050:Spectrometry, Fluorescence / Q000379:methods*
D000900:Anti-Bacterial Agents; D009643:Norfloxacin