title: Rapid comprehensive characterization of crude oils by thermogravimetry coupled to fast modulated gas chromatography-single photon ionization time-of-flight mass spectrometry.
abstract: Comprehensive multi-dimensional hyphenation of a thermogravimetry device (i.e. a thermobalance) to gas chromatography and single photon ionization-time-of-flight mass spectrometry (TG-GC×SPI-MS) has been used to investigate two crude oil samples of different geographical origin. The source of the applied vacuum ultraviolet radiation is an electron beam pumped rare gas excimer lamp (EBEL). The soft photoionization favors the formation of molecular ions. Introduction of a fast, rapidly modulated gas chromatographic separation step in comparison with solely TG-SPI-MS enables strongly enhanced detection especially with such highly complex organic matrices as crude oil. In contrast with former TG-SPI-MS measurements, separation and identification of overlying substances is possible because of different GC retention times. The specific contribution of isobaric compounds to one mass signal is determined for alkanes, naphthalenes, alkylated benzenes, and other compounds.
authors.affiliation: Joint Mass Spectrometry Centre, Comprehensive Molecular Analytics, Helmholtz Zentrum München, Ingolstädter Landstraße 1, 85764 Neuherberg, Germany.
authors.forename: S
authors.initials: S
authors.lastname: Wohlfahrt
authors.forename: M
authors.initials: M
authors.lastname: Fischer
authors.forename: M
authors.initials: M
authors.lastname: Saraji-Bozorgzad
authors.forename: G
authors.initials: G
authors.lastname: Matuschek
authors.forename: T
authors.initials: T
authors.lastname: Streibel
authors.forename: E
authors.initials: E
authors.lastname: Post
authors.forename: T
authors.initials: T
authors.lastname: Denner
authors.forename: R
authors.initials: R
authors.lastname: Zimmermann
mesh_terms: D004867:Equipment Design; D008401:Gas Chromatography-Mass Spectrometry / Q000191:economics / Q000295:instrumentation*; D010578:Petroleum / Q000032:analysis*; D013818:Thermogravimetry / Q000295:instrumentation*; D013997:Time Factors
chemical_list: D010578:Petroleum