On-line microdialysis coupled with microbore liquid chromatography for the determination of unbound chloramphenicol and its glucuronide in rat blood
1998; Elsevier BV; Volume: 720; Issue: 1-2 Linguagem: Inglês
10.1016/s0378-4347(98)00435-6
ISSN1872-812X
AutoresTung-Hu Tsai, Fu‐Chou Cheng, Ling-Chien Hung, Chieh-Fu Chen,
Tópico(s)Microfluidic and Capillary Electrophoresis Applications
ResumoOn-line microdialysis coupled with microbore liquid chromatography was used to investigate the pharmacokinetics of chloramphenicol and its glucuronide in rat blood. A microdialysis probe was inserted into a jugular vein of male Sprague–Dawley rats. Chloramphenicol succinate (20 mg/kg, intravenously) was then administered via a femoral vein. Dialysates were automatically injected onto a LC system, via an on-line injector. Samples were eluted with a mobile phase containing acetonitrile-10 mM monochloroacetic acid (30:70, v/v, pH 3.0). The UV detector wavelength was set at 278 nm. The limit of quantitation for chloramphenicol was 10 ng/ml. The in vitro recoveries of chloramphenicol and chloramphenicol glucuronide at 500 ng/ml were 32.2±0.3% and 11.4±0.7%, respectively (n=6). Intra- and inter-assay accuracy and precision of the analyses were ≤10% in the range of 0.01 to 5.0 μg/ml.
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