title: Quantification of clotiazepam in human plasma by gas chromatography-mass spectrometry.
abstract: An analytical procedure was developed and validated for the quantification of clotiazepam in human plasma. After subjecting plasma samples to solid-phase extraction, the extract was evaporated and the residue re-constituted. An aliquot of the mixture was injected onto a gas chromatography-mass spectrometry system. The detector response was linear for clotiazepam concentrations in the range of 5-200 ng/ml. Intra- and inter-day precision for the assay over the concentration range was below 13.1 and 13.5%, and the accuracy ranged between 99.0-107.9% and 92.4-101.3%, respectively. The drug was found to be stable under various processing conditions used. The method is applicable to human pharmacokinetic studies of clotiazepam.
authors.affiliation: Department of Pharmaceutics, College of Pharmacy, Seoul National University, San 56-1, Shinlim-dong, Kwanak-gu, 151-742, South Korea.
authors.forename: Sung-Hoon
authors.initials: SH
authors.lastname: Ahn
authors.forename: Han-Joo
authors.initials: HJ
authors.lastname: Maeng
authors.forename: Tae-Sung
authors.initials: TS
authors.lastname: Koo
authors.forename: Dae-Duk
authors.initials: DD
authors.lastname: Kim
authors.forename: Chang-Koo
authors.initials: CK
authors.lastname: Shim
authors.forename: Suk-Jae
authors.initials: SJ
authors.lastname: Chung
mesh_terms: D001381:Azepines / Q000097:blood* / Q000493:pharmacokinetics; D008401:Gas Chromatography-Mass Spectrometry / Q000379:methods*; D006801:Humans; D012015:Reference Standards; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity
chemical_list: D001381:Azepines; C084599:clotiazepam