Archives: Peer-Reviewed Studies

Biodegradation preference for isomers of alkylated naphthalenes and benzothiophenes in marine sediment contaminated with crude oil

Authors: George D. Wardlaw, Robert K. Nelson, Christopher M. Reddy, David L. Valentine Abstract Contamination of coastal marine sediments with polycyclic aromatic hydrocarbons is pervasive, with major sources including anthropogenic activity and natural seepage. Biodegradation serves as a major hydrocarbon sink with evaporation and dissolution responsible for the removal of low boiling range compounds and …

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Qualitative and quantitative analysis of pyrolysis oil by gas chromatography with flame ionization detection and comprehensive two-dimensional gas chromatography with time-of-flight mass spectrometry

Authors: Themistoklis Sfetsas, Chrysa Michailof, Angelos Lappas, Qiangyi Li, Brian Kneale Abstract Pyrolysis oils have attracted a lot of interest, as they are liquid energy carriers and general sources of chemicals. In this work, gas chromatography with flame ionization detector (GC-FID) and two-dimensional gas chromatography with time-of-flight mass spectrometry (GC × GC–TOFMS) techniques were used to provide …

Qualitative and quantitative analysis of pyrolysis oil by gas chromatography with flame ionization detection and comprehensive two-dimensional gas chromatography with time-of-flight mass spectrometry Read More »

Comprehensive two-dimensional gas chromatography with time-of-flight mass spectrometry combined with solid phase microextraction as a powerful tool for quantification of ethyl carbamate in fortified wines. The case study of Madeira wine

Authors: Rosa Perestrelo, Sílvia Petronilho, José S. Câmara, Sílvia M. Rocha Abstract An analytical methodology based on headspace solid phase microextraction (HS-SPME) combined with comprehensive two-dimensional gas chromatography—time-of-flight mass spectrometry (GC × GC–ToFMS) was developed for the identification and quantification of the toxic contaminant ethyl carbamate (EC) directly in fortified wines. The method performance was assessed for …

Comprehensive two-dimensional gas chromatography with time-of-flight mass spectrometry combined with solid phase microextraction as a powerful tool for quantification of ethyl carbamate in fortified wines. The case study of Madeira wine Read More »

Biomass derived feedstock co-processing with vacuum gas oil for second-generation fuel production in FCC units

Authors: Gabriella Fogassy, Nicolas Thegarid, Guy Toussaint, Andre C, van Veen,Yves Schuurman, Claude Mirodatos Abstract Hydrodeoxygenated pyrolysis-oils (HDO-oil) are considered promising renewable liquid energy carriers. As such, it cannot be applied in in-stationary combustion engines so more “upgrading” is required. A considerable alternative is to co-process HDO-oil along with vacuum gas oil (VGO) in a …

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Micro-pyrolysis of technical lignins in a new modular rig and product analysis by GC–MS/FID and GC GC–TOFMS/FID

Authors: Michael Windt, Dietrich Meier, Jan Henk Marsman, Hero Jan Heeres, Sjaakde Koning Abstract A new offline-pyrolysis rig has been designed to allow multifunctional experiments for preparative and analytical purposes. The system conditions can be set and monitored, e.g. temperature, its gradients and heat flux. Some special features include (1) high heating rates up to …

Micro-pyrolysis of technical lignins in a new modular rig and product analysis by GC–MS/FID and GC GC–TOFMS/FID Read More »

Identification and classification of components in flash pyrolysis oil and hydrodeoxygenated oils by two-dimensional gas chromatography and time-of-flight mass spectrometry

Authors: J.H. Marsman, J. Wildschut, P. Evers, S. de Koning, H.J. Heeres Abstract Hydrodeoxygenated pyrolysis oils (HDO) are considered promising renewable liquid energy carriers. To gain insights in the various reaction pathways taking place during the hydrodeoxygenation reaction of pyrolysis oil, two-dimensional gas chromatography with time-of-flight mass spectrometric analyses (2D-GC–TOF-MS) was applied on the feedstock …

Identification and classification of components in flash pyrolysis oil and hydrodeoxygenated oils by two-dimensional gas chromatography and time-of-flight mass spectrometry Read More »

Comprehensive multi-dimensional chromatographic studies on the separation of saturated hydrocarbon ring structures
in petrochemical samples

Authors: R. Edam, J. Blomberg, H.-G. Janssen, P.J. Schoenmakers Abstract Characterization of complex petrochemical samples has been a classical subject of comprehensive two-dimensional (2D) gas chromatography (GC × GC). Macroscopic properties of these samples can be described accurately by separation of compounds in classes of identical molecular functionality. Ring structures in the carbon backbone of these compounds, …

Comprehensive multi-dimensional chromatographic studies on the separation of saturated hydrocarbon ring structures
in petrochemical samples Read More »

Identification of a novel alkenone in Black Sea sediments

Authors: L. Xu, C.M. Reddy, J.W. Farrington, G.S. Frysinger, R.B. Gaines, C.G. Johnson, R.K. Nelson, T.I. Eglinton Abstract We report the identification of a novel long-chain ketone in Holocene Black Sea sediments. Based on chemical properties, and chromatographic and mass spectrometric characteristics, this compound has been identified as a di-unsaturated C36 ethyl ketone. Further analyses indicated …

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