PuSH - Publication Server of Helmholtz Zentrum München: Determination of photoionization cross-sections of different organic molecules using gas chromatography coupled to single-photon ionization (SPI) time-of-flight mass spectrometry (TOF-MS) with an electron-beam-pumped rare gas excimer light source (EBEL): Influence of molecular structure and analytical implications.

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Eschner, M.S. ; Zimmermann, R.

Determination of photoionization cross-sections of different organic molecules using gas chromatography coupled to single-photon ionization (SPI) time-of-flight mass spectrometry (TOF-MS) with an electron-beam-pumped rare gas excimer light source (EBEL): Influence of molecular structure and analytical implications.

Appl. Spectrosc. 65, 806-816 (2011)

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Open Access Green as soon as Postprint is submitted to ZB.

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This work describes a fast and reliable method for determination of photoionization cross-sections (PICS) by means of gas chromatography (GC) coupled to single-photon ionization mass spectrometry (SPI-MS). Photoionization efficiency (PIE) data for 69 substances was obtained at a photon energy of 9.8 ± 0.4 eV using an innovative electron-beam-pumped rare gas excimer light source (EBEL) filled with argon. The investigated analytes comprise 12 alkylbenzenes as well as 11 other substituted benzenes, 23 n-alkanes, ten polyaromatic hydrocarbons, seven aromatic heterocycles, and six polyaromatic heterocycles. Absolute PICS for each substance at 9.8 eV are calculated from the relative photoionization efficiencies of the compounds with respect to benzene, whose photoionization cross-section data is well known. Furthermore, a direct correlation between the type of benzene substituents and their absolute PICS is presented and discussed in depth. Finally, comparison of previously measured photoionization cross-sections for 20 substances shows good agreement with the data of the present work.

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Publication type Article: Journal article

Document type Scientific Article

Corresponding Author

Keywords Photoionization cross-sections; Excimer light source; EBEL; Single-photon ionization; Time-of-flight mass spectrometry; TOF-MS; SPI-MS

ISSN (print) / ISBN 0003-7028

e-ISSN 1943-3530

Journal Applied Spectroscopy

Quellenangaben Volume: 65, Issue: 7, Pages: 806-816

Publisher Optical Society of America (OSA)

Non-patent literature Publications

Reviewing status Peer reviewed

Institute(s) Cooperation Group Comprehensive Molecular Analytics (CMA)