Single Photon Ionization Orthogonal Acceleration Time-of-Flight Mass Spectrometry and Resonance Enhanced Multiphoton Ionization Time-of-Flight Mass Spectrometry for Evolved Gas Analysis in Thermogravimetry: Comparative Analysis of Crude Oils
| Autor: | Marc Gonin, Bernhard M. Krooss, Alois Fendt, Mohammad R. Saraji-Bozorgzad, Thorsten Streibel, Robert Geissler, Ralf Zimmermann, Martin Sklorz, Katrin Fuhrer, Thomas Denner, E. Kaisersberger, T. Gröger |
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| Rok vydání: | 2009 |
| Předmět: | |
| Zdroj: | Analytical Chemistry. 81:6038-6048 |
| ISSN: | 1520-6882 0003-2700 |
| DOI: | 10.1021/ac900216y |
| Popis: | Coupling thermal analysis (TA) with a subsequent analytical method in order to investigate evolved gaseous products from the thermal analysis is a well established method. A popular practice to analyze the gaseous products evolving from thermal analysis is mass spectrometry using electron impact ionization (EI).(1-4) As the kinetic energy of the electrons thereby is typically far beyond the ionization energies of the assayed samples, the electron impact effects fragmentation particularly of organic compounds, hampering the correlation of the ion signals to the gaseous compounds. This applies for complex mixtures in particular. Fragmentation can be reduced using so-called soft ionization techniques. In the course of the presented setup, single photon ionization (SPI) using electron beam pumped excimer lamps (EBEL) emitting vacuum ultraviolet (VUV) light (λ = 126 nm) is employed. For the instrumentation, a TA system has been coupled to an EBEL-SPI-oaTOFMS (oaTOFMS: orthogonal acceleration time-of-flight mas... |
| Databáze: | OpenAIRE |
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