title: Near-ultraviolet femtosecond laser ionization of dioxins in gas chromatography/time-of-flight mass spectrometry.
abstract: Gas chromatography/multiphoton ionization/time-of-flight mass spectrometry (GC/MPI/TOF-MS) was applied to the trace analysis of polychlorinated dibenzo-p-dioxins and polychlorinated dibenzofurans (PCDD/Fs). To determine the optimum wavelength for analysis of PCDD/Fs, the wavelength of the femtosecond laser utilized for multiphoton ionization was converted to near-ultraviolet status using stimulated Raman scattering. A femtosecond laser emitting at 300 nm completely eliminated the background signal arising from the bleeding compounds generated from a stationary phase of the capillary column in GC.
authors.affiliation: Department of Applied Chemistry, Graduate School of Engineering, Kyushu University, Fukuoka, Japan.
authors.forename: Satoshi
authors.initials: S
authors.lastname: Yamaguchi
authors.forename: Fumiaki
authors.initials: F
authors.lastname: Kira
authors.forename: Yuki
authors.initials: Y
authors.lastname: Miyoshi
authors.forename: Tomohiro
authors.initials: T
authors.lastname: Uchimura
authors.forename: Yuka
authors.initials: Y
authors.lastname: Watanabe-Ezoe
authors.forename: Shin-ichi
authors.initials: S
authors.lastname: Zaitsu
authors.forename: Tomoko
authors.initials: T
authors.lastname: Imasaka
authors.forename: Totaro
authors.initials: T
authors.lastname: Imasaka
mesh_terms: D000393:Air Pollutants / Q000032:analysis* / Q000737:chemistry; D001572:Benzofurans / Q000032:analysis / Q000737:chemistry; D000072338:Dibenzofurans, Polychlorinated; D004147:Dioxins / Q000032:analysis* / Q000737:chemistry; D008401:Gas Chromatography-Mass Spectrometry; D007834:Lasers; D000072317:Polychlorinated Dibenzodioxins / Q000031:analogs & derivatives / Q000032:analysis / Q000737:chemistry; D012680:Sensitivity and Specificity; D013059:Spectrum Analysis, Raman; D013696:Temperature; D013997:Time Factors; D014466:Ultraviolet Rays
chemical_list: D000393:Air Pollutants; D001572:Benzofurans; D000072338:Dibenzofurans, Polychlorinated; D004147:Dioxins; D000072317:Polychlorinated Dibenzodioxins; C014211:2,3,7,8-tetrachlorodibenzofuran