Publications by authors named "Thomas Denner"

Ionic liquids are often considered as green alternatives of volatile organic solvents. The thermal behavior of the ionic liquids is relevant for a number of emerging large-scale applications at elevated temperature. Knowledge about the degradation products is indispensable for treatment and recycling of the used ionic liquids.

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The design of the so-called "Peltier modulator" is presented. It is a new dual-stage consumable-free thermal modulator for thermal analysis-gas chromatography-mass spectrometry (TA-GC-MS). It requires only electrical power for operation as it facilitates thermo-electric coolers instead of cryogenics for trapping and resistive on-column heating for reinjection.

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Article Synopsis
  • - This research introduces a new ultrafast-cycling gas chromatography module (fast-GC module) for direct-sampling gas chromatography/mass spectrometry (GC-MS) that can complete a temperature cycle in just 30 seconds.
  • - The module uses a unique fused silica capillary column stack and a halogen lamp for efficient heating, along with a high airflow blower for quick cooling, making it adaptable to various separation columns and temperature programs.
  • - An application of the fast-GC module is demonstrated with thermal analysis coupled to GC-MS, allowing improved gas separation while preserving the online analytical process, overcoming limitations seen in traditional fast-GC systems.
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Multi-dimensional analysis (MDA) in analytical chemistry is often applied to improve the selectivity of an analytical device and, therefore, to achieve a better overview of a sample composition. Recently, the hyphenation of thermogravimetry with single photo ionization mass spectrometry (TG-SPIMS) using an electron beam pumped excimer lamp (EBEL) for VUV radiation was applied. The concept of MDA has been realized by upgrading the TG-SPIMS system with a quasi comprehensive chromatographic separation step before the soft ionization (TG-GCxSPIMS).

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