Active capillary plasma source for ambient mass spectrometry

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Author(s) Nudnova, Maryia M., Zhu, Liang, Zenobi, Renato
Publication Type Journal Items, Publication Status: Published
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Title Active capillary plasma source for ambient mass spectrometry
Author(s) Nudnova, Maryia M.
Zhu, Liang
Zenobi, Renato
Journal or Series Title Rapid communications in mass spectrometry
Volume Number 26
Issue Number 12
Start Page 1447
End Page 1452
ISSN 0951-4198
Publisher Wiley
Publication Place London
Publication Date 2012-06-30
Abstract Rationale
Imaging mass spectrometry with high spatial resolution has become a rapidly developing area of mass spectrometric research. Many scientific and industrial problems deal with mass spectrometric analysis at ambient pressures. This requires efficient transport and ionization of small amounts of substance.

An active sampling capillary based on a dielectric barrier discharge was constructed for ambient mass spectrometry. The capillary serves as an ionization source as well as an atmospheric interface of the mass spectrometer. The analyzed samples are transported through the sampling capillary due to the pressure difference between the atmospheric environment and the vacuum in the mass spectrometer. Ionization of the transported samples is provided by a low-temperature dielectric barrier discharge. This active capillary was shown to work in a robust fashion for ionizing both gas-phase and laser-ablated solid-phase samples.

The geometry of the electrodes was found to play a crucial role in ionization efficiency. The capillary was optimized in order to perform surface analysis of solid samples. Sensitivity tests were carried out to characterize different active capillary constructions. The sensitivity of the constructed active capillary was 0.1?ppb (relative concentration of a gaseous sample in ambient air). The active capillary was able to detect samples evaporated from a solid surface. With the active capillary source, it was possible to detect anthracene traces evaporated from a surface located 3?cm from the capillary inlet.

A plasma-based active capillary ionization source was constructed. This concept of an active sample inlet should broaden the range of applications of ambient mass spectrometry.
DOI 10.1002/rcm.6242
Additional Notes Received 20 February 2012, Revised 2 April 2012, Accepted 3 April 2012, Published online 4 May 2012
Document Type Article
Publication Status Published
Language English
Assigned Organisational Unit(s) 03430
Organisational Unit(s)
NEBIS System Number 000038989
Source Database ID WOS-000304154300007
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  author = "Nudnova, Maryia M. and Zhu, Liang and Zenobi, Renato",
  title = "{A}ctive capillary plasma source for ambient mass spectrometry",
  journal = "Rapid communications in mass spectrometry",
  year = 2012,
  volume = "26",
  number = "12",
  pages = "1447--1452",
  month = jun,

E-Citations record created: Mon, 18 Jun 2012, 17:11:14 CET