Journal of Analytical Chemistry

, Volume 66, Issue 14, pp 1392–1397 | Cite as

Gas-dynamic fluctuations and noises in the interface of an atmospheric pressure ionization ion source

  • A. N. Bazhenov
  • S. V. Bulovich
  • L. N. Gall’
  • N. R. Gall’Email author


The paper discusses the mechanisms of origin of ion current noise in a mass spectrometer owing to gas dynamic processes in the interface. It has been shown that the effect can be strong for a so-called ‘short’ interface, where the distance between the sampler outlet, that is, the nozzle or transportation capillary, is of the same size as the Mach barrel length, which would take place if the gas can extend freely. The spectra of gas dynamic noises have been computed in the axially symmetric approach for the above interfaces; the computed noise spectra have been shown to correlate well with those measured for total ion current to the interface skimmer.


noise spectrum Mach barrel shock wave gas dynamic interface 


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Copyright information

© Pleiades Publishing, Ltd. 2011

Authors and Affiliations

  • A. N. Bazhenov
    • 1
  • S. V. Bulovich
    • 2
  • L. N. Gall’
    • 3
  • N. R. Gall’
    • 4
    Email author
  1. 1.Gramberg All-Russia Research Institute of Geology and Mineral Resources of the World Ocean (VNIIOkeangeologiya)St. PetersburgRussia
  2. 2.St. Petersburg State Technical UniversitySt. PetersburgRussia
  3. 3.Institute of Analytical Instrument MakingRussian Academy of SciencesSt. PetersburgRussia
  4. 4.Ioffe Physicotechnical InstituteRussian Academy of SciencesSt. PetersburgRussia

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