title: Quantification of clopidogrel in human plasma by sensitive liquid chromatography/tandem mass spectrometry.
abstract: A simple, sensitive and rapid high-performance liquid chromatography/positive electrospray ionization tandem mass spectrometry method was developed and validated for the assay of clopidogrel in human plasma. Following liquid-liquid extraction, the analytes were separated using an isocratic mobile phase on a reversed-phase column and analyzed by mass spectrometry in the multiple reaction monitoring mode using the respective [M+H](+) ions, m/z 322/212 for clopidogrel and m/z 264/154 for the internal standard. The assay exhibited a linear dynamic range of 5-6000 pg/mL for clopidogrel in human plasma. The lower limit of quantification was 5 pg/mL with a relative standard deviation of less than 8%. Acceptable precision and accuracy were obtained for concentrations over the standard curve range. A run time of 2.5 min for each sample made it possible to analyze more than 400 human plasma samples per day. The validated method has been successfully used to analyze human plasma samples for application in pharmacokinetic, bioavailability or bioequivalence studies.
authors.affiliation: Biopharmaceutical Research, Suven Life Sciences Ltd., Serene Chambers, Road # 7, Banjara Hills, Hyderabad 500 034, India. ramakrishna_nirogi@yahoo.co.in
authors.forename: Ramakrishna V S
authors.initials: RV
authors.lastname: Nirogi
authors.forename: Vishwottam N
authors.initials: VN
authors.lastname: Kandikere
authors.forename: Manoj
authors.initials: M
authors.lastname: Shukla
authors.forename: Koteshwara
authors.initials: K
authors.lastname: Mudigonda
authors.forename: Santosh
authors.initials: S
authors.lastname: Maurya
authors.forename: Ravikumar
authors.initials: R
authors.lastname: Boosi
mesh_terms: D000328:Adult; D002138:Calibration; D002851:Chromatography, High Pressure Liquid; D000077144:Clopidogrel; D006801:Humans; D007202:Indicators and Reagents; D016014:Linear Models; D010975:Platelet Aggregation Inhibitors / Q000097:blood* / Q000493:pharmacokinetics; D012015:Reference Standards; D015203:Reproducibility of Results; D053719:Tandem Mass Spectrometry; D013810:Therapeutic Equivalency; D013988:Ticlopidine / Q000031:analogs & derivatives* / Q000097:blood / Q000493:pharmacokinetics
chemical_list: D007202:Indicators and Reagents; D010975:Platelet Aggregation Inhibitors; D000077144:Clopidogrel; D013988:Ticlopidine