title: High performance liquid chromatography-electrospray ionization mass spectrometric determination of balofloxacin in human plasma and its pharmacokinetics.
abstract: A selective and sensitive high performance liquid chromatography-electrospray ionisation-mass spectrometry method has been developed for the determination of balofloxacin (BLFX) in human plasma. The sample preparation was a liquid-liquid extraction, and chromatographic separation was achieved with an Agilent ZORBAX 300SB C18 2.1 mm x 150 mm column using a mobile phase comprised of methanol-water (10 mM CH(3)COONH(4), pH 3.0)=40:60 (v/v). Standard curves were linear (r=0.9992) over the concentration range of 0.03-3 microg/ml and had good accuracy and precision. The within- and between-batch precisions were within 10% relative standard deviation (R.S.D.). The limit of detection (LOD) was 0.02 microg/ml. The validated HPLC-electrospray ionization (ESI)-MS method has been used successfully to study balofloxacin pharmacokinetics in healthy volunteers.
authors.affiliation: Key Laboratory of Drug Quality Control and Pharmacovigilance (China Pharmaceutical University), Ministry of Education, PR China.
authors.forename: Zuwei
authors.initials: Z
authors.lastname: Bian
authors.forename: Yuan
authors.initials: Y
authors.lastname: Tian
authors.forename: Zunjian
authors.initials: Z
authors.lastname: Zhang
authors.forename: Fengguo
authors.initials: F
authors.lastname: Xu
authors.forename: Jinheng
authors.initials: J
authors.lastname: Li
authors.forename: Xiaomei
authors.initials: X
authors.lastname: Cao
mesh_terms: D000328:Adult; D000900:Anti-Bacterial Agents / Q000097:blood* / Q000493:pharmacokinetics; D002851:Chromatography, High Pressure Liquid / Q000379:methods*; D005260:Female; D024841:Fluoroquinolones / Q000097:blood* / Q000493:pharmacokinetics; D006801:Humans; D008297:Male; D012015:Reference Standards; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity; D021241:Spectrometry, Mass, Electrospray Ionization / Q000379:methods*
chemical_list: D000900:Anti-Bacterial Agents; D024841:Fluoroquinolones; C077155:balofloxacin