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Virtual Journal for Biomedical Optics

Virtual Journal for Biomedical Optics

| EXPLORING THE INTERFACE OF LIGHT AND BIOMEDICINE

  • Editor: Gregory W. Faris
  • Vol. 2, Iss. 9 — Sep. 26, 2007

Vacuum Ultraviolet Photoionization Mass Spectra and CrossSections for Volatile Organic Compounds at 10.5 eV

Nozomu Kanno and Kenichi Tonokura

Applied Spectroscopy, Vol. 61, Issue 8, pp. 896-902 (2007)


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Abstract

Vacuum ultraviolet single-photon ionization time-of-flight mass spectrometry (VUV-SPI-TOFMS) has been applied to the detection of volatile organic compounds (VOCs), including aromatic, chlorinated, and oxygenated compounds. Photoionization mass spectra of 23 VOCs were measured using SPI-TOFMS at 10.5 eV (118 nm). The limits of detection of VOCs using SPI-TOFMS at 10.5 eV were estimated to be a few ppbv. The mass spectra of 20 VOCs exhibit only the parent ion and its isotopes' signals. The ionization processes of the VOCs were discussed on the basis of the reaction enthalpies predicted by the quantum chemical calculations. Absolute photoionization cross-sections for 23 VOCs, including 12 newly measured VOCs, at 10.5 eV were determined in comparison to the reported absolute photoionization cross-section of NO.

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Vol. 2, Iss. 9 Virtual Journal for Biomedical Optics

Citation
Nozomu Kanno and Kenichi Tonokura, "Vacuum Ultraviolet Photoionization Mass Spectra and CrossSections for Volatile Organic Compounds at 10.5 eV," Appl. Spectrosc. 61, 896-902 (2007)
http://www.opticsinfobase.org/vjbo/abstract.cfm?URI=as-61-8-896


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