Design and performance of an atmospheric pressure sampling interface for ion-trap/time-of-flight mass spectrometry

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Author(s) Setz, Patrick D., Schmitz, Thomas A., Zenobi, Renato
Publication Type Journal Items, Publication Status: Published
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Title Design and performance of an atmospheric pressure sampling interface for ion-trap/time-of-flight mass spectrometry
Author(s) Setz, Patrick D.
Schmitz, Thomas A.
Zenobi, Renato
Description 9 p.
Journal or Series Title Review of scientific instruments
Volume Number 77
Issue Number 2
Start Page 024101
ISSN 0034-6748
1089-7623
Publisher American Institute of Physics
Publication Place New York, NY
Publication Date 2006
Abstract An ion-trap/time-of-flight mass spectrometer in combination with an atmospheric pressure sampling interface was developed in order to simultaneously profit from the ease of sample handling at ambient pressure, from the storage and accumulation capabilities of an ion trap, and from the acquisition speed and sensitivity of a time-of-flight mass spectrometer. The sampling interface is an intermediate-pressure vacuum manifold that serves to enrich sampled analytes by jet separation with respect to the carrier gas (air) and simultaneously maintain vacuum conditions inside the ion-trap/time-of-flight instrument. Neutral analyte molecules are sampled and later ionized either by electron impact or chemical ionization. Ion accumulation is performed with a rf-only quadrupole ion trap with ground potential on the end caps during storage. For mass analysis, the trap's electrodes serve as a pulsed ion source for the attached linear time-of-flight mass spectrometer. In addition, laser desorbed molecules can also be sampled with this kind of instrument. Successful operation is shown by analyzing volatile substances (aniline, bromobenzene, styrene, and perfluorotributylamine), as well as laser-desorbed organic solids. Figures of merit include a sensitivity of 10 ppm, resolving power of 300 and demonstration of a mass spectrum of laser-desorbed anthracene with a signal-to-noise ratio of 270.
DOI 10.1063/1.2165550
Additional Notes Received 25 October 2005, Accepted 16 December 2005, Published 24 February 2006
Document Type Article
Publication Status Published
Language English
Assigned Organisational Unit(s) 03430
Organisational Unit(s)
NEBIS System Number 000025185
Source Database ID PP-24962
WOS-000235664200031
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@article{Stz2006,
  author = "Setz, Patrick D. and Schmitz, Thomas A. and Zenobi, Renato",
  title = "{D}esign and performance of an atmospheric pressure sampling interface for ion-trap/time-of-flight mass spectrometry",
  journal = "Review of scientific instruments",
  year = 2006,
  volume = "77",
  number = "2",
  pages = "024101--",
}


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