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Open Access Green as soon as Postprint is submitted to ZB.
Single-photon ionization quadrupole mass spectrometry with an electron beam pumped excimer light source.
Anal. Chem. 77, 2218-2226 (2005)
The application of soft ionization methods for mass spectrometry (MS), such as single-photon ionization (SPI) using vacuum ultraviolet (VUV) light, provides powerful analytical instrumentation for real-time on-line monitoring of organic substances in gaseous matrixes. A compact and mobile quadrupole mass spectrometer (QMS) system using a novel electron beam pumped rare gas VUV lamp for SPI has been developed for on-line analysis of organic trace compounds (ppb concentrations). The VUV radiation of the light source is employed for SPI in the ion source of the QMS. The concept of the interfacing of the VUV light source with the QMS is described and the SPI-QMS is characterized. On-line detection limits down to 50 ppb for benzene, toluene, and m-xylene were achieved. The instrument is well suited for continuous measurements of aromatic and aliphatic trace compounds and can therefore be used for on-line monitoring of trace compounds in dynamically fluctuating process gases. First measurements of gas standards, petrochemical samples, and on-line monitoring of automotive exhaust are presented.
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Publication type
Article: Journal article
Document type
Scientific Article
Keywords
single-photon; ionization; quadrupole mass spectrometry; SPI; QMS; VUV
ISSN (print) / ISBN
0003-2700
e-ISSN
1520-6882
Journal
Analytical Chemistry
Quellenangaben
Volume: 77,
Issue: 7,
Pages: 2218-2226
Publisher
American Chemical Society (ACS)
Reviewing status
Peer reviewed
Institute(s)
Institute of Ecological Chemistry (IOEC)