title: Liquid chromatography-tandem mass spectrometry (LC-MS-MS) method for simultaneous determination of venlafaxine and its active metabolite O-desmethyl venlafaxine in human plasma.
abstract: A rapid and sensitive liquid chromatography-tandem mass spectrometry (LC-MS-MS) method has been developed and validated for simultaneous quantification of venlafaxine (VEN) and O-desmethyl venlafaxine (ODV) in human plasma. The analytes were extracted from human plasma by using solid-phase extraction (SPE) technique. Escitalopram (ESC) was used as the internal standard. A Betasil C18 column provided chromatographic separation of analytes followed by detection with mass spectrometry. The mass transition ion-pair has been followed as m/z 278.27-->121.11 for VEN, m/z 264.28-->107.10 for ODV and m/z 325.00-->262.00 for ESC. The method involves a solid phase extraction from plasma, simple isocratic chromatography conditions and mass spectrometric detection that enables detection at nanogram levels. The proposed method has been validated with linear range of 3-300 ng/ml for VEN and 6-600 ng/ml for ODV. The intrarun and interrun precision and accuracy values are within 10%. The overall recoveries for VEN and ODV were 95.9 and 81.7%, respectively. Total elution time as low as 3 min only.
authors.affiliation: Bioanalytical Department, Torrent Research Centre, Near Indira bridge, Village Bhat, Gandhinagar 382428, Gujarat, India. jigu_baroda@rediffmail.com
authors.forename: Jignesh
authors.initials: J
authors.lastname: Bhatt
authors.forename: Arvind
authors.initials: A
authors.lastname: Jangid
authors.forename: Gantala
authors.initials: G
authors.lastname: Venkatesh
authors.forename: Gunta
authors.initials: G
authors.lastname: Subbaiah
authors.forename: Sadhana
authors.initials: S
authors.lastname: Singh
mesh_terms: D018687:Antidepressive Agents, Second-Generation / Q000097:blood*; D002853:Chromatography, Liquid / Q000379:methods*; D015283:Citalopram / Q000097:blood; D003511:Cyclohexanols / Q000097:blood*; D000069468:Desvenlafaxine Succinate; D006801:Humans; D012015:Reference Standards; D021241:Spectrometry, Mass, Electrospray Ionization / Q000379:methods*; D000069470:Venlafaxine Hydrochloride
chemical_list: D018687:Antidepressive Agents, Second-Generation; D003511:Cyclohexanols; D015283:Citalopram; D000069470:Venlafaxine Hydrochloride; D000069468:Desvenlafaxine Succinate