High-res MS

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FT-ICR-MS is applied for the characterization of polar compounds like NSO (nitrogen, sulfur and oxygen containing organic compounds) in fossil and recent geological samples (sediments, sedimentary rocks, coals, soils, and water samples), assessment of secondary alteration processes in petroleum systems (maturation, biodegradation, and migration), characterization of high molecular weight aromatic compounds, elucidation of molecular formulae and molecular imaging.

GC-MS in general is used for identification and quantification of organic compounds in complex mixtures, analysis of fossil biomarkers, analysis of aromatic hydrocarbons and structure elucidation.

The Thermo Q-Exactive Plus (Orbitrap#1) used for high-resolution, high-sensitivity target compound analysis (via Thermo UltiMate 3000 UHPLC); clumped and position-specific carbon isotope analysis via direct infusion or via HPLC autosampler with loop (ESI). Thermo Q-Exactive Plus (Orbitrap#2) is used for clumped and position-specific carbon isotope analysis via direct infusion (APPI & APCI). Thermo GC-Exploris (Orbitrap#2) is used for clumped and position-specific carbon isotope analysis via GC (EI).

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Instrumentation

Laboratory instrumentation

Instruments

  • Fourier Transform Ion Cyclotron Resonance Mass Spectrometer

    Mass spectrometer based on the principle of ion cyclotron resonance in which an ion in a magnetic field moves in a circular orbit at the cyclotron frequency that is characteristic of its m/z value. Ions are coherently excited to a larger radius orbit using a pulse of radio frequency electric field, and their image charge is detected on receiver plates as a time domain signal. Fourier transformation of the time domain signal results in a frequency domain signal that is converted to a mass spectrum based on the inverse relationship between cyclotron frequency and m/z. (Source: IUPAC; https://doi.org/10.1351/PAC-REC-06-04-06)

  • Gas Chromatography Mass Spectrometer

    In the simplest terms, the GC/MS instrument represents a device that separates chemical mixtures (the GC component) and a very sensitive detector (the MS component) with a data collector (the computer component). Additional information available at "http://caag.state.ca.us/bfs/toxlab/gcms.htm" [Summary provided by the California Bureau of Forensic Services] (Source: Global Change Master Directory (GCMD). 2023. GCMD Keywords, Version 16.3. Greenbelt, MD: Earth Science Data and Information System, Earth Science Projects pision, Goddard Space Flight Center (GSFC) National Aeronautics and Space Administration (NASA). URL (GCMD Keyword Forum Page): https://forum.earthdata.nasa.gov/app.php/tag/GCMD+Keywords)

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