title: Determination of pentazocine in human whole blood and urine by gas chromatography/surface ionization organic mass spectrometry.
abstract: Pentazocine has been found to be measurable with much higher sensitivity by gas chromatography (GC)/surface ionization (SI) organic mass spectrometry (OMS) than by the conventional GC/electron ionization (EI) mass spectrometry. The compound was extracted from human whole blood and urine with Sep-Pak C(18) cartridges before analysis by GC/SIOMS; recoveries were > 96.6% for both samples. The calibration curves were linear in the range 6.25-100 ng ml(-1) and the detection limits were 500 pg ml(-1) of a sample by selected ion monitoring (SIM) with GC/SIOMS. The intra- and inter-day relative standard deviations for the determination of pentazocine in whole blood and urine were not greater than 9.6%. The sensitivity for pentazocine obtained by SI-SIM was about 60 times higher than that obtained by EI-SIM. To validate the present GC/SIOMS method for pentazocine, whole blood and urine samples collected from two volunteers 1-6 h after intramuscular injection of 15 mg of pentazocine were analyzed. The concentrations were 13.5-59.3 ng ml(-1) for whole blood and 0.39-4.00 microg ml(-1) for urine.
authors.affiliation: Department of Legal Medicine Hamamatsu University School of Medicine, 3600 Handa-cho, Hamamatsu 431-3192, Japan.
authors.forename: H
authors.initials: H
authors.lastname: Seno
authors.forename: T
authors.initials: T
authors.lastname: Kumazawa
authors.forename: A
authors.initials: A
authors.lastname: Ishii
authors.forename: H
authors.initials: H
authors.lastname: Matsushima
authors.forename: K
authors.initials: K
authors.lastname: Watanabe-Suzuki
authors.forename: O
authors.initials: O
authors.lastname: Suzuki
mesh_terms: D000701:Analgesics, Opioid / Q000097:blood / Q000652:urine; D000996:Antitussive Agents / Q000097:blood / Q000652:urine; D002849:Chromatography, Gas / Q000379:methods*; D003915:Dextromethorphan / Q000097:blood / Q000652:urine; D006801:Humans; D013058:Mass Spectrometry / Q000379:methods*; D010423:Pentazocine / Q000097:blood* / Q000652:urine*; D011786:Quality Control
chemical_list: D000701:Analgesics, Opioid; D000996:Antitussive Agents; D003915:Dextromethorphan; D010423:Pentazocine