title: Development of a sensitive and rapid liquid chromatography/tandem mass spectrometry method for the determination of apomorphine in canine plasma.
abstract: A sensitive, rapid and specific quantitative liquid chromatography/tandem mass spectrometry (LC/MS/MS) method was developed and validated for the determination of apomorphine (APO) in canine plasma. The analytes were prepared using one-step liquid-liquid extraction, and analyzed on a Waters Symmetry C(18) column interfaced with triple quadrupole tandem mass spectrometer. A mixture of methanol/0.1% formic acid in water (70: 30, v/v) was employed as the isocratic mobile phase. Positive electrospray ionization was utilized as the ionization source. The analyte and clenbuterol (internal standard) were both detected using multiple reaction monitoring (MRM) mode. The limit of detection (LOD) obtained was 0.03 ng/mL. The assay was linear over the concentration range of 0.1-100 ng/mL, and provided good precision (RSD) and good accuracy (RE). The analyte was stable by using antioxidants throughout the whole study. The experimental results show that LC/MS/MS is a rapid and sensitive method to analyze APO in plasma. Finally, the proposed method was successfully applied to a pharmacokinetic study of APO after intranasal administration of 0.5 mg apomorphine to 10 healthy beagle dogs.
authors.affiliation: Department of Pharmaceutical Analysis, School of Pharmacy, Fudan University, Shanghai 200032, P.R. China.
authors.forename: B
authors.initials: B
authors.lastname: Yang
authors.forename: J B
authors.initials: JB
authors.lastname: Zhu
authors.forename: C H
authors.initials: CH
authors.lastname: Deng
authors.forename: G L
authors.initials: GL
authors.lastname: Duan
mesh_terms: D000281:Administration, Intranasal; D000818:Animals; D001058:Apomorphine / Q000032:analysis* / Q000493:pharmacokinetics; D002851:Chromatography, High Pressure Liquid / Q000379:methods*; D004285:Dogs; D018491:Dopamine Agonists / Q000032:analysis* / Q000493:pharmacokinetics; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity; D021241:Spectrometry, Mass, Electrospray Ionization / Q000379:methods*; D053719:Tandem Mass Spectrometry / Q000379:methods*
chemical_list: D018491:Dopamine Agonists; D001058:Apomorphine