title: High-performance liquid chromatographic method for the simultaneous determination of enrofloxacin and its primary metabolite ciprofloxacin in canine serum and prostatic tissue.
abstract: A simple and sensitive high-performance liquid chromatographic method was developed for the determination of enrofloxacin and ciprofloxacin in canine serum and prostatic tissue. Sample preparation consisted of mixing canine serum with a 1:1 dilution of acetonitrile and 0.1 M sodium hydroxide followed by ultrafiltration through a 10,000 molecular mass cut-off filter. Prostatic tissue was sonicated with the same solution prior to ultrafiltration. Separation of these two quinolones in the ultrafiltrate was accomplished by ion-paired liquid chromatography using a reversed-phase analytical column eluted with an acetonitrile-methanol-water solution. Enrofloxacin and ciprofloxacin were detected by a photometric ultraviolet-visible detector set at 278.6 nm and confirmed by a photodiode array detector operating from 230 to 360 nm. The limits of detection for enrofloxacin and ciprofloxacin were 4 and 2 ng/ml, respectively.
authors.affiliation: Department of Anatomy, Physiological Sciences and Radiology, College of Veterinary Medicine, North Carolina State University, Raleigh 27606.
authors.forename: K
authors.initials: K
authors.lastname: Tyczkowska
authors.forename: K M
authors.initials: KM
authors.lastname: Hedeen
authors.forename: D P
authors.initials: DP
authors.lastname: Aucoin
authors.forename: A L
authors.initials: AL
authors.lastname: Aronson
mesh_terms: D000818:Animals; D000890:Anti-Infective Agents / Q000097:blood / Q000378:metabolism*; D002851:Chromatography, High Pressure Liquid; D002939:Ciprofloxacin / Q000097:blood / Q000378:metabolism*; D004285:Dogs; D000077422:Enrofloxacin; D024841:Fluoroquinolones; D008297:Male; D011467:Prostate / Q000032:analysis*; D015363:Quinolones; D013056:Spectrophotometry, Ultraviolet
chemical_list: D000890:Anti-Infective Agents; D024841:Fluoroquinolones; D015363:Quinolones; D000077422:Enrofloxacin; D002939:Ciprofloxacin