title: Determination of ranolazine in human plasma by liquid chromatographic-tandem mass spectrometric assay.
abstract: A highly sensitive liquid chromatographic-tandem mass spectrometric method (LC-MS-MS) is developed to quantitate ranolazine in human plasma. The analyte and internal standard tramadol are extracted from plasma by liquid-liquid extraction using diethyl ether-dichloromethane (60:40 v/v), and separated on a Zorbax extend C18 column using methanol-10mM ammonium acetate (60:40 v/v, pH 4.0) at a flow of 1.0 mL/min. Detection is carried out by multiple reaction monitoring on a QtrapTM LC-MS-MS system with an electrospray ionization interface. The assay is linear over the range 10-5000 ng/mL with a limit of quantitation of 10 ng/mL and a lower limit of detection (S/N > 3) of 1 ng/mL. Intra- and inter-day precision are < 3.1% and < 2.8%, respectively, and the accuracy is in the range 96.7-101.6%. The validated method is successfully used to analyze the drug in samples of human plasma for pharmacokinetic studies.
authors.affiliation: Second Clinical Hospital affiliated to Chinese Medical University, Shenyang 110004, P.R. China. lmzhao16@hotmail.com
authors.forename: Limei
authors.initials: L
authors.lastname: Zhao
authors.forename: Hao
authors.initials: H
authors.lastname: Li
authors.forename: Yao
authors.initials: Y
authors.lastname: Jiang
authors.forename: Riyang
authors.initials: R
authors.lastname: Piao
authors.forename: Pengfei
authors.initials: P
authors.lastname: Li
authors.forename: Jingkai
authors.initials: J
authors.lastname: Gu
mesh_terms: D000083:Acetanilides / Q000097:blood* / Q000493:pharmacokinetics / Q000627:therapeutic use; D000787:Angina Pectoris / Q000188:drug therapy; D001682:Biological Availability; D002853:Chromatography, Liquid / Q000379:methods*; D004791:Enzyme Inhibitors / Q000097:blood* / Q000493:pharmacokinetics / Q000627:therapeutic use; D006801:Humans; D010879:Piperazines / Q000097:blood* / Q000493:pharmacokinetics / Q000627:therapeutic use; D000069458:Ranolazine; D012680:Sensitivity and Specificity; D053719:Tandem Mass Spectrometry / Q000379:methods*; D013810:Therapeutic Equivalency
chemical_list: D000083:Acetanilides; D004791:Enzyme Inhibitors; D010879:Piperazines; D000069458:Ranolazine