title: Simultaneous determination of rifampicin and sulbactam in mouse plasma by high-performance liquid chromatography.
abstract: A simple and rapid high-performance liquid chromatographic (HPLC) method with ultraviolet detection has been developed and validated for the simultaneous determination of rifampicin and sulbactam in mouse plasma. Plasma samples were deproteinized with acetonitrile and separated by HPLC on a RP-18 (125 x 4 mm, 5 microm) column and gradient elution with potassium dihydrogen phosphate solution (pH 4.5; 50 mm) and acetonitrile at a flow-rate of 1.0 mL/min. Rifampicin and sulbactam were monitored at 230 nm and confirmed by means of their UV spectra using a diode-array detector. The method was linear at plasma levels from 1 to 100 microg/mL for rifampicin and from 5 to 200 microg/mL for sulbactam. The limits of quantification were 0.6 microg/mL for rifampicin and 4.2 microg/mL for sulbactam. The intra- and inter-day precisions of the method (RSD) were lower than 5% for both compounds. Average recoveries of rifampicin and sulbactam from mice plasma were 98.2 and 89.3%, respectively. The developed method was successfully applied to the determination of the pharmacokinetic profile of both compounds in mice.
authors.affiliation: Department of Analytical Chemistry, University of Seville, 41011 Seville, Spain. iaparicio@us.es
authors.forename: Irene
authors.initials: I
authors.lastname: Aparicio
authors.forename: Miguel Angel
authors.initials: MA
authors.lastname: Bello
authors.forename: Manuel
authors.initials: M
authors.lastname: Callejón
authors.forename: Alfonso
authors.initials: A
authors.lastname: Guiraúm
mesh_terms: D000818:Animals; D002851:Chromatography, High Pressure Liquid / Q000379:methods*; D051379:Mice; D008810:Mice, Inbred C57BL; D015203:Reproducibility of Results; D012293:Rifampin / Q000097:blood* / Q000493:pharmacokinetics; D013407:Sulbactam / Q000097:blood* / Q000493:pharmacokinetics
chemical_list: D013407:Sulbactam; D012293:Rifampin