title: Determination of macrolide antibiotics in porcine and bovine urine by high-performance liquid chromatography coupled to coulometric detection.
abstract: A high-performance liquid chromatography method coupled to coulometric detection has been applied for the determination, in a single run, of up to eight macrolide antibiotics (erythromycin [ERY], tylosin [TYL], tilmicosin [TILM], spiramycin 2 [SPI 2], spiramycin 3 [SPI 3], josamycin [JOS], kitasamycin [KIT], and rosamicin [ROS]) in spiked porcine and bovine urine. Quantification was performed using matrix-matched calibration with roxithromycin (ROX) as the internal standard. The detection limits for each drug were below 3.5 ng injected (equivalent to an initial concentration below 0.07 mg L(-1)) for porcine urine and below 5 ng injected (equivalent to an initial concentration below 0.10 mg L(-1)) for bovine urine. Recoveries from urine samples spiked at three different concentrations within the linear range were not significantly dependent on concentration. The entire procedure provides average macrolide recoveries ranging from 69.7 to 96.6% for bovine urine and from 75.5 and 96.1% for porcine urine.
authors.affiliation: European Commission, Joint Research Centre, Institute for Reference Materials and Measurements, Retieseweg 111, 2440, Geel, Belgium. maria-jose.gonzalez-de-la-huebra@cec.eu.int
authors.forename: María José
authors.initials: MJ
authors.lastname: González de la Huebra
authors.forename: Ursula
authors.initials: U
authors.lastname: Vincent
authors.forename: Guy
authors.initials: G
authors.lastname: Bordin
authors.forename: Adela Rosa
authors.initials: AR
authors.lastname: Rodríguez
mesh_terms: D000818:Animals; D000900:Anti-Bacterial Agents / Q000652:urine*; D002138:Calibration; D002417:Cattle; D002851:Chromatography, High Pressure Liquid / Q000379:methods*; D004563:Electrochemistry / Q000379:methods*; D012680:Sensitivity and Specificity; D013552:Swine
chemical_list: D000900:Anti-Bacterial Agents