title: Trace quantitation of the novel cholinesterase inhibitor in human plasma by capillary gas chromatography/ion trap mass spectrometry.
abstract: This paper demonstrates the utility of an ion trap mass spectrometer as a detector for trace quantitative determinations of pharmaceuticals in human plasma by capillary gas chromatography/mass spectrometry. A novel acetylcholinesterase inhibitor (CI-1002) was selected as an illustrative example for the technique. When coupled with a selective solid-phase extraction, this approach was capable of quantifying as little as 34 pg (0.50 ng ml-1, RSD = 12.7%) of compound on the column, and the inter-run precision was typically 3-4% RSD over a 0.5-25 ng ml-1 linear range. The advantages and requirements of the technique, in addition to the prospects for improvements in the detection limit, are discussed.
authors.affiliation: Department of Pharmacokinetics and Drug Metabolism, Parke-Davis Pharmaceutical Research, Division of Warner-Lambert Company, Ann Arbor, MI 48189, USA.
authors.forename: K L
authors.initials: KL
authors.lastname: Hoffman
authors.forename: D T
authors.initials: DT
authors.lastname: Rossi
authors.forename: D S
authors.initials: DS
authors.lastname: Wright
mesh_terms: D002138:Calibration; D002800:Cholinesterase Inhibitors / Q000097:blood*; D008401:Gas Chromatography-Mass Spectrometry / Q000295:instrumentation / Q000379:methods*; D006801:Humans; D011786:Quality Control; D011799:Quinazolines / Q000097:blood*; D012015:Reference Standards; D015203:Reproducibility of Results
chemical_list: D002800:Cholinesterase Inhibitors; D011799:Quinazolines; C092564:PD 142676