title: Determination of 5-aminoimidazole-4-carboxamide in human plasma by ion-pair extraction and LC-MS/MS.
abstract: A liquid chromatography/tandem mass spectrometry (LC-MS/MS) method was established for the determination of 5-aminoimidazole-4-carboxamide (AICA) in human plasma. The method included a solvent extraction of AICA as an ion pair with 1-pentanesulfonate ion and a separation on a Hypersil ODS2 column with the mobile phase of methanol-water (68:32, v/v). Determination was performed using an electrospray ionization source in positive ion mode (ESI(+)). Multiple reaction monitoring (MRM) was utilized for the detection monitoring m/z at 127-->110 for AICA, and 172-->128 for IS. The calibration curve was linear within a range from 20 to 2000 ng/mL and the limit of quantity for AICA in plasma was 20 ng/mL. RSD of intra-assay and inter-assay were no more than 5.90% and 5.65%.
authors.affiliation: Center of Drug Metabolism & Pharmacokinetics, China Pharmaceutical University, 24 Tongjiaxiang, Nanjing, China. chenxj-lab@hotmail.com
authors.forename: Xijing
authors.initials: X
authors.lastname: Chen
authors.forename: Jing
authors.initials: J
authors.lastname: Jing
authors.forename: Weichao
authors.initials: W
authors.lastname: Ren
authors.forename: De-En
authors.initials: DE
authors.lastname: Han
authors.forename: Ning
authors.initials: N
authors.lastname: Jing
authors.forename: Guangji
authors.initials: G
authors.lastname: Wang
mesh_terms: D000620:Aminoimidazole Carboxamide / Q000031:analogs & derivatives / Q000097:blood* / Q000737:chemistry / Q000302:isolation & purification / Q000493:pharmacokinetics; D002853:Chromatography, Liquid / Q000379:methods*; D006801:Humans; D012044:Regression Analysis; D021241:Spectrometry, Mass, Electrospray Ionization / Q000379:methods*; D053719:Tandem Mass Spectrometry / Q000379:methods*
chemical_list: D000620:Aminoimidazole Carboxamide; C000259:orazamide