title: Pre-study and in-study validation of an ultra-high pressure LC method coupled to tandem mass spectrometry for off-line determination of oxytetracycline in nasal secretions of healthy pigs.
abstract: In order to quantify oxytetracycline (OTC) in nasal secretions of healthy pigs after intramuscular injection of OTC at doses of 10, 20 and 40 mg/kg bodyweight, an original method based on ultra-high pressure liquid chromatography coupled to tandem mass spectrometry (UPLC-MS/MS) was developed and fully validated. Sample preparation consisted in protein precipitation preceded by the addition of a releasing protein reagent. Metacycline (MTC) was used as internal standard. Separation was carried out at 65 degrees C in the gradient elution mode on a short analytical column filled with Acquity BEH C(18) stationary phase. The mobile phase consisted in a mixture of water and acetonitrile containing 1 mM of oxalic acid and 0.1% (v/v) of formic acid. The triple quadrupole mass spectrometer operated in the positive electrospray ionization mode; OTC and MTC were detected using multiple reaction monitoring. The pre-study and in-study validation of this bioanalytical method was performed by applying a novel strategy based on total measurement error and accuracy profiles. The maximum risk of observing future measurements falling outside the acceptance limits during routine as well as the measurements uncertainty were also estimated.
authors.affiliation: Unit of Pharmacology, Pharmacotherapy and Toxicology, Department for Functional Sciences, Veterinary Medicine, B41, University of Liege, B-4000 Liege, Belgium.
authors.forename: M A
authors.initials: MA
authors.lastname: Bimazubute
authors.forename: E
authors.initials: E
authors.lastname: Rozet
authors.forename: I
authors.initials: I
authors.lastname: Dizier
authors.forename: J-Cl
authors.initials: JC
authors.lastname: Van Heugen
authors.forename: E
authors.initials: E
authors.lastname: Arancio
authors.forename: P
authors.initials: P
authors.lastname: Gustin
authors.forename: J
authors.initials: J
authors.lastname: Crommen
authors.forename: P
authors.initials: P
authors.lastname: Chiap
mesh_terms: D000818:Animals; D000900:Anti-Bacterial Agents / Q000032:analysis*; D002851:Chromatography, High Pressure Liquid / Q000379:methods*; D009297:Nasal Mucosa / Q000737:chemistry* / Q000378:metabolism; D010118:Oxytetracycline / Q000032:analysis*; D013552:Swine; D053719:Tandem Mass Spectrometry / Q000379:methods*
chemical_list: D000900:Anti-Bacterial Agents; D010118:Oxytetracycline