10.18453/rosdok_id00002052 Rüger, Christopher Paul Christopher Paul Rüger http://d-nb.info/gnd/115604989X Universität Rostock 2018 540 Chemistry & allied sciences 2018 en http://purl.uni-rostock.de/rosdok/id00002052 urn:nbn:de:gbv:28-diss2018-0046-3 Novel approaches for the analysis of complex mixtures by high-resolution mass spectrometry are shown. A laser desorption/ionisation method for combustion particles was developed, whereas in electrospray ionisation a new dopant was introduced. For gas chromatography automatised algorithms providing more reliable data were developed. Coupling to thermal analysis enlarged the detectable species. This approach is evaluated for various complex mixtures, such as petrochemicals and biomass. Finally, a detailed chemical description of the most complex crude oil fraction, asphaltenes, could be shown.