title: Rapid liquid chromatography-tandem mass spectrometry method for quantification of ziprasidone in human plasma.
abstract: A liquid chromatography-tandem mass spectrometry (LC-MS/MS) method for the determination of ziprasidone (ZIP) in human plasma was developed. ZIP and N-methyl ziprasidone as internal standard (IS) were extracted from alkalinized plasma using tert- butyl methyl ether. Separation was performed isocratically on a C8 column with 90% acetonitrile containing 2 mmol/L ammonium acetate as a mobile phase with a total run time of 2.5 min. MS/MS transitions of m/z 413 --> 194 and m/z 427 --> 177 of the analyte and internal standard were used for quantification. Confirmatory ions of m/z 413 --> 177 and m/z 427 --> 180 were collected as well. The calibration curve based on peak-area ratio was linear up to at least 200 ng/mL with a detection limit of 0.1 ng/mL. The method showed satisfactory reproducibility with a coefficient of variation of less than 5%. The method was successfully applied to the analysis of ZIP in spiked human plasma.
authors.affiliation: Department of Genetics, King Faisal Specialist Hospital and Research Centre, PO Box 3354, Riyadh 11211, Saudi Arabia.
authors.forename: Osama Y
authors.initials: OY
authors.lastname: Al-Dirbashi
authors.forename: Hassan Y
authors.initials: HY
authors.lastname: Aboul-Enein
authors.forename: Ahmed
authors.initials: A
authors.lastname: Al-Odaib
authors.forename: Minnie
authors.initials: M
authors.lastname: Jacob
authors.forename: Mohamed S
authors.initials: MS
authors.lastname: Rashed
mesh_terms: D002853:Chromatography, Liquid / Q000379:methods*; D010879:Piperazines / Q000097:blood*; D012680:Sensitivity and Specificity; D021241:Spectrometry, Mass, Electrospray Ionization / Q000379:methods*; D013844:Thiazoles / Q000097:blood*
chemical_list: D010879:Piperazines; D013844:Thiazoles; C092292:ziprasidone