Miniaturized EI/Q/oa TOF mass spectrometer

V. D. Berkout, R. J. Cotter, D. P. Segers

Research output: Contribution to journalArticlepeer-review

36 Scopus citations


A miniaturized orthogonal time-of-flight mass spectrometer with an electron impact ionization ion source and a rf quadrupole ion guide has been developed. A mass resolving power of m/Δm = 5500 has been obtained in a 0.4 m instrument. The addition of helium at pressures of about 4.0 mtorr into the ion source showed collisional focusing taking place in the rf quadrupole. An automated gas chromatograph designed for air monitoring applications has been coupled to the time-of-flight mass analyzer and tested for the detection of simulants of chemical-warfare agents.

Original languageEnglish (US)
Pages (from-to)641-647
Number of pages7
JournalJournal of the American Society for Mass Spectrometry
Issue number6
StatePublished - 2001

ASJC Scopus subject areas

  • Structural Biology
  • Spectroscopy


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