title: The validation of a bioanalytical method for the determination of clopidogrel in human plasma.
abstract: A fast, sensitive and specific LC-MS/MS bioanalytical method for the determination of unchanged clopidogrel in human plasma has been developed and validated over the range of 10-12,000 pg mL(-1) (r2 0.9993) by the Contract Research group at HFL. Samples (0.3 mL) were buffered (pH 6.8), extracted using diethyl ether and 10 microL of the sample extract was injected onto the LC-MS/MS system. Analysis was performed using a C8 column (temperature controlled to 50 degrees C) by gradient elution at a flow rate of 0.9 mL min(-1) over a 3 min run time. Retention times of 1.61 and 1.59 min were observed for clopidogrel and 2H3-clopidogrel (I.S.), respectively. Detection was achieved using a Sciex API 4000, triple quadrupole mass spectrometer, in positive TurboIonspray (electrospray) ionisation mode. Ion transitions were monitored using MRM (multiple reaction monitoring) for clopidogrel (m/z 322-212) and for 2H3-clopidogrel (m/z 327-217). This validated method was used to support a pharmacokinetic study in healthy volunteers.
authors.affiliation: HFL Ltd., Newmarket Road, Fordham, Cambridgeshire CB7 5WW, UK. arobinson@hfl.co.uk
authors.forename: A
authors.initials: A
authors.lastname: Robinson
authors.forename: J
authors.initials: J
authors.lastname: Hillis
authors.forename: C
authors.initials: C
authors.lastname: Neal
authors.forename: A C
authors.initials: AC
authors.lastname: Leary
mesh_terms: D002851:Chromatography, High Pressure Liquid / Q000379:methods*; D000077144:Clopidogrel; D006801:Humans; D015394:Molecular Structure; D010975:Platelet Aggregation Inhibitors / Q000097:blood / Q000737:chemistry / Q000493:pharmacokinetics; D015203:Reproducibility of Results; D053719:Tandem Mass Spectrometry / Q000379:methods*; D013988:Ticlopidine / Q000031:analogs & derivatives* / Q000097:blood / Q000737:chemistry / Q000493:pharmacokinetics
chemical_list: D010975:Platelet Aggregation Inhibitors; D000077144:Clopidogrel; D013988:Ticlopidine