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Open Access Green möglich sobald Postprint bei der ZB eingereicht worden ist.
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)
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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Publikationstyp
Artikel: Journalartikel
Dokumenttyp
Wissenschaftlicher Artikel
Schlagwörter
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
Zeitschrift
Applied Spectroscopy
Quellenangaben
Band: 65,
Heft: 7,
Seiten: 806-816
Verlag
Optical Society of America (OSA)
Nichtpatentliteratur
Publikationen
Begutachtungsstatus
Peer reviewed