Laser mass spectrometry of the Di‐, Tri‐ and tetrachlorobenzenes: Isomer‐selective ionization and detection

The resonant two-photon ionization spectra of the S1←S0 transition of all di-, tri- and tetrachlorinated benzene isomers, cooled by supersonic jet expansion, are presented. As the spectra are well structured and isomer specific, this technique allows selective ionization of a single isomer out of mixtures such as, for example, environmental samples. Reflectron time-of-flight mass spectrometry is used for the mass-selective detection of the ions.

[1]  R. Zimmermann,et al.  Laser mass spectrometry of dibenzodioxin, dibenzofuran and two isomers of dichlorodibenzodioxins: Selective ionization , 1993 .

[2]  R. Weinkauf,et al.  Reflectron time-of-flight mass spectrometry and laser excitation for the analysis of neutrals, ionized molecules and secondary fragments , 1992 .

[3]  C. Rohlfing,et al.  Resonant two-photon ionization spectroscopy of jet-cooled p-dichlorobenzene , 1989 .

[4]  T. Öberg,et al.  Indicator parameters for PCDD/PCDF , 1989 .

[5]  C. Zetzsch,et al.  The UV absorption spectra of the trichlorobenzenes and the higher chlorinated benzenes in the gas phase and in n-hexane solution , 1987 .

[6]  D. Lubman.  Optically selective molecular mass spectrometry , 1987 .

[7]  O. Hutzinger,et al.  PCDD und PCDF: Gefahr für Mensch und Umwelt? , 1986 .

[8]  D. Lubman,et al.  Applicability of resonant two-photon ionization in supersonic beam mass spectrometry to halogenated aromatic hydrocarbons , 1985 .

[9]  D. Lubman,et al.  Isotopically selective resonant two-photon ionization in supersonic beams , 1985 .

[10]  C. Rappe.  Analysis of polychlorinated dioxins and furans. , 1984, Environmental science & technology.

[11]  J. Reilly,et al.  Analysis of Polyaromatic Hydrocarbon Mixtures with Laser Ionization Gas Chromatography/Mass Spectrometry, , 1983 .

[12]  D. Levy.  The Spectroscopy of Very Cold Gases , 1981, Science.

[13]  J. V. Knop,et al.  Photoelectron spectra of and ab initio calculations on chlorobenzenes. 2. Trichlorobenzenes, tetrachlorobenzenes, and pentachlorobenzene , 1981 .

[14]  R. Smalley,et al.  Molecular optical spectroscopy with supersonic beams and jets , 1977 .