title: Coupling of solid phase microextraction with electrospray ionization ion mobility spectrometry and direct analysis of venlafaxine in human urine and plasma.
abstract: The capability of electrospray ionization-conventional ion mobility spectrometry (ESI-IMS) for direct analysis of the samples extracted by solid phase microextraction (SPME) was investigated and evaluated for the first time. To that end, an appropriate new desorption chamber was designed and constructed, resulting in the possibility of direct exposure of the SPME fiber to the electrospray solvent flow. Two different elution methods in dynamic and static modes were exhaustively investigated. The results indicated that the interface could help us to have an accurate and sensitive analysis without disturbing the electrospray process, in static elution method. Venlafaxine as a test compound was extracted from human urine and plasma by a convenient headspace SPME method. The positive ion mobility spectrum of the extracted drug was obtained and the analyte responses were calculated. The coupled method of SPME-ESI-IMS was comprehensively validated in terms of sensitivity, dynamic range, and recovery percentage. Finally, various real samples of human urine and plasma were analyzed, all verifying the feasibility and success of the proposed method for the easy routine analysis.
authors.affiliation: Department of Chemistry, Isfahan University of Technology, Isfahan 84156-83111, Iran. Electronic address: jafari@cc.iut.ac.ir.
authors.forename: Mohammad T
authors.initials: MT
authors.lastname: Jafari
authors.affiliation: Department of Chemistry, Isfahan University of Technology, Isfahan 84156-83111, Iran.
authors.forename: Mohammad
authors.initials: M
authors.lastname: Saraji
authors.affiliation: Department of Chemistry, Isfahan University of Technology, Isfahan 84156-83111, Iran.
authors.forename: Amir H
authors.initials: AH
authors.lastname: Ameri
mesh_terms: D000328:Adult; D000818:Animals; D001774:Blood Chemical Analysis / Q000379:methods*; D003511:Cyclohexanols / Q000032:analysis* / Q000097:blood / Q000302:isolation & purification* / Q000652:urine; D006801:Humans; D006863:Hydrogen-Ion Concentration; D008297:Male; D051381:Rats; D015203:Reproducibility of Results; D012492:Salts / Q000737:chemistry; D052617:Solid Phase Microextraction / Q000379:methods*; D021241:Spectrometry, Mass, Electrospray Ionization / Q000379:methods*; D013696:Temperature; D013997:Time Factors; D016482:Urinalysis / Q000379:methods*; D000069470:Venlafaxine Hydrochloride
chemical_list: D003511:Cyclohexanols; D012492:Salts; D000069470:Venlafaxine Hydrochloride
keywords: Electrospray ionization; Ion mobility spectrometry; Solid phase microextraction; Venlafaxine