Pyrolysis of various furan model compounds

Schrödter, Ronald; Baltes, Werner

doi:10.1016/0165-2370(91)80039-b

Cited by 8 publications

(1 citation statement)

References 5 publications

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“…The isolation of such furanoid species could indicate the formation of glycosidically linked sugar derivatives (17). The latter fact is also supported by the high levels of the abovementioned furaldehydes, which can be formed by thermally and electron-impact induced fragmentations of bridged structures between two or three furan nuclei (18). The mode of formation of difurylmethanes, however, is not yet clear (19).…”

Section: Resultsmentioning

confidence: 95%

Thermal Degradation Studies of Glucose/Glycine Melanoidins

Tehrani

Keršienė

Adams

et al. 2002

J. Agric. Food Chem.

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Nondialyzable and water-insoluble melanoidins, isolated from a glucose/glycine model reaction mixture, which was prepared in a standardized way according to the guidelines of the COST Action 919, were heated at different temperatures ranging from 100 to 300 °C. Among the volatile compounds, which were analyzed by SPME and GC-MS, pyrazines, pyridines, pyrroles, and furans were detected. In general, total amounts of volatile compounds increased with the temperature. When water-insoluble melanoidins were heated, especially at higher temperatures, this resulted in a higher diversity of isolated compounds. For furans, pyrroles, pyrazines, and carbonyl compounds a maximum was observed in the case of high molecular weight melanoidins around 200-220 °C. Pyridines and total oxazoles, however, were generated in higher yields with increasing temperatures. These results demonstrate the possibility of producing some flavor-significant volatiles from heated standard melanoidins at temperatures relevant to food preparation and contribute to the flavor aspects originating from melanoidins.

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Section: Resultsmentioning

confidence: 95%

Thermal Degradation Studies of Glucose/Glycine Melanoidins

Tehrani

Keršienė

Adams

et al. 2002

J. Agric. Food Chem.

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Ion trap and quadrupole mass spectra of lignin pyrolysates: How well do they compare?

Galletti

Reeves

Francis

et al. 1993

Rapid Comm Mass Spectrometry

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Lignin samples from wheat straw, orchard grass, red clover and a synthetic lignin were subjected to pyrolysis gas chromatography/mass spectrometry using both quadrupole (QMS) and ion-trap detector (ITD). ITD mass spectra were comparable with those presented in the National Bureau of Standards (NBS) library and with those obtained by QMS as evaluated by discrepancy factors. Computer-assisted library searches for ITD spectra were successful for 22 of 47 compounds. The other 25 compounds were not present in the library. A typical program and mass spectra are shown. Statistical data are discussed.

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MASPEX-Europa: The Europa Clipper Neutral Gas Mass Spectrometer Investigation

Waite,

Burch,

Brockwell

et al. 2024

Space Sci Rev

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The MAss Spectrometer for Planetary EXploration (MASPEX) is a high-mass-resolution, high-sensitivity, multi-bounce time-of-flight mass spectrometer (MBTOF) capable of measuring minor species with abundances of sub-parts-per-million in Europa’s sputter-produced and radiolytically modified exosphere and in its oceanic plumes. The goal of the MASPEX-Europa investigation is to determine, through in-situ measurement of the exosphere and plume composition, whether the conditions for habitability exist or have existed on Europa. As conventionally defined, based on our knowledge of Earth life, the three fundamental conditions for habitability are: (1) the presence of liquid water; (2) the presence of organic compounds and the biogenic elements CHNOPS; and (3) a source of energy available for metabolic processes, which for Europa will most probably be chemosynthetic rather than photosynthetic. Condition (1) is already established by previous indirect (magnetic field) measurements, while MASPEX will contribute directly to the evaluation of condition (2) through highly specific compositional measurements in the Europan exosphere and plumes. The composition measurements will also contribute to the test of condition (3) through disequilibrium states of chemical reactions. Thus, the primary goal of MASPEX for Europa Clipper is to assess the habitability of Europa and specifically of its interior ocean. MASPEX has been developed successfully, and its calibration has demonstrated that it meets its specified requirements for sensitivity, dynamic range, and mass resolution. This paper reports the development of the MASPEX scientific investigation, the instrument, its performance, and calibration.

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Pyrolysis of various furan model compounds

Cited by 8 publications

References 5 publications

Thermal Degradation Studies of Glucose/Glycine Melanoidins

Thermal Degradation Studies of Glucose/Glycine Melanoidins

Ion trap and quadrupole mass spectra of lignin pyrolysates: How well do they compare?

MASPEX-Europa: The Europa Clipper Neutral Gas Mass Spectrometer Investigation

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