title: Determination of meloxicam in human plasma by liquid chromatography-tandem mass spectrometry following transdermal administration.
abstract: A highly sensitive and selective liquid chromatography-tandem mass spectrometry (LC-MS-MS) method was developed to determine meloxicam of low concentration in human plasma. After a simple sample preparation procedure by one-step protein precipitation with methanol, meloxicam and the internal standard piroxicam were chromatographed on a Zorbax SB C(18) column. The mobile phase consisted of acetonitrile-water-formic acid (80:20:0.2, v/v/v). Detection was performed on a triple quadrupole tandem mass spectrometer by selected reaction monitoring (SRM) mode via electrospray ionization (ESI) source. The method had a lower limit of quantification of 0.10 ng/ml. The calibration curve was demonstrated to be linear over the concentration range of 0.10-50.0 ng/ml. The assay was specific, accurate (percentage deviations from nominal concentrations were within +/-2.5%), precise (intra- and inter-day relative standard deviation (R.S.D.) <7%). The validated method was successfully applied to the determination of meloxicam in human plasma collected up to 180 h after a transdermal administration of 30 mg meloxicam for evaluation of the pharmacokinetics.
authors.affiliation: School of Pharmacy, Shenyang Pharmaceutical University, 103 Wenhua Road, Shenyang 110016, PR China.
authors.forename: Yue
authors.initials: Y
authors.lastname: Yuan
authors.forename: Xiaoyan
authors.initials: X
authors.lastname: Chen
authors.forename: Dafang
authors.initials: D
authors.lastname: Zhong
mesh_terms: D000894:Anti-Inflammatory Agents, Non-Steroidal / Q000097:blood* / Q000493:pharmacokinetics; D019540:Area Under Curve; D002853:Chromatography, Liquid / Q000379:methods*; D016861:Cyclooxygenase Inhibitors / Q000097:blood* / Q000493:pharmacokinetics; D006801:Humans; D000077239:Meloxicam; D012015:Reference Standards; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity; D053719:Tandem Mass Spectrometry / Q000379:methods*; D013843:Thiazines / Q000097:blood* / Q000493:pharmacokinetics; D013844:Thiazoles / Q000097:blood* / Q000493:pharmacokinetics
chemical_list: D000894:Anti-Inflammatory Agents, Non-Steroidal; D016861:Cyclooxygenase Inhibitors; D013843:Thiazines; D013844:Thiazoles; D000077239:Meloxicam