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Development of a Compact Supersonic Jet/Multiphoton Ionization/Time-of-Flight Mass Spectrometer for the On-site Analysis of Dioxin, Part I: Evaluation of Basic Performance

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Abstract

A new type of compact supersonic jet/resonance-enhanced multiphoton ionization/time-of-flight mass spectrometer is described. The analytical instrument, consisting of a single turbo molecular pump equipped with a rotary pump, was maintained at < 2 × 10-3 Pa when a 0.3-atm sample was injected into a vacuum at 10-Hz using a 200-μs pulse valve. The diameters of the extraction and ground skimmer electrodes were expanded to 30 mm in order to avoid strong focusing and defocusing of the ion, and the optimum conditions for the system were investigated. The mass spectrometer functioned as expected: (1) no defocusing of the ion beam was observed even when the potential of the einzel lens was adjusted to zero; (2) the direction of the ion beam to an assembly of microchannel plates deviated in the expected manner when the potential of the defection electrode was changed from 0 to 30 V.

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Authors and Affiliations

  1. Department of Applied Chemistry, Graduate School of Engineering, Kyushu University, Hakozaki, Higashi-ku, Fukuoka, 812-8581, Japan

    Junichi Matsumoto & Totaro Imasaka

  2. Ulvac Kyushu Corporation, Nijo, Itoshima, Fukuoka, 819-1613, Japan

    Bunji Nakano

Authors
  1. Junichi Matsumoto
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  2. Bunji Nakano
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  3. Totaro Imasaka
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Correspondence to Totaro Imasaka.

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Matsumoto, J., Nakano, B. & Imasaka, T. Development of a Compact Supersonic Jet/Multiphoton Ionization/Time-of-Flight Mass Spectrometer for the On-site Analysis of Dioxin, Part I: Evaluation of Basic Performance. ANAL. SCI. 19, 379–382 (2003). https://doi.org/10.2116/analsci.19.379

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  • DOI: https://doi.org/10.2116/analsci.19.379

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