Authors: Edward Schram, Johan Schrama, Kasper Kusters, Christiaan Kwadijk, Arjan Palstra Abstract The presence of geosmin in fish products causes an earthy or musty off-flavour. To avoid economic damage resulting from market entrance of off-flavoured fish products, fish farmers utilize the reversibility of geosmin uptake to depurate the off-flavours from their fish crops by holding …
Authors: Simon T.Belt, Patricia Cabedo-Sanz Abstract We report the structures and analytical data for several highly branched isoprenoid (HBI) mono- and di-unsaturated alkenes (monoenes and dienes). This has been achieved by isolating several well characterised HBI dienes from diatom cultures and sediments, and transforming these to structurally related monoenes and other dienes using partial hydrogenation …
Authors: Gregor McCombie, Karsten Hötzer, Jürg Daniel, Maurus Biedermann, Angela Eicher, Koni Grob Abstract Passing from local converters backwards through the supply chain, nine major producers of polyolefin granulates were asked to supply the declaration of compliance (DoC) and supporting documentation (SD) underpinning the safety of the substances potentially migrating into foods, as legally required …
Compliance work for polyolefins in food contact: Results of an official control campaign Read More »
Authors: Rosaria Costa, Marco Beccaria, Elisa Grasso, Ambrogina Albergamo, Marianna Oteri, Paola Dugo, Salvatore Fasulo, Luigi Mondello Abstract Objective of this work was to develop suitable extraction methodologies for the isolation of lipids from fish, mussels and clams from the Mediterranean sea, and their successive analysis by means of advanced chromatographic instrumentation. More specifically, three …
Authors: Mariusz Dziadas, Henryk H. Jeleń Abstract Four synthesized terpenyl-ß-d-glycopyranosides (geranyl, neryl, citronellyl, myrtenyl) were subjected to enzymatic (AR 2000, pH 5.5) and acid (citric buffer, pH 2.5) hydrolysis. Decrease of glycosides was measured by HPLC and the volatiles released – by comprehensive gas chromatography–mass spectrometry (GC × GC–ToF-MS). Enzymatic hydrolysis performed for 21 h yielded 100% degree …
Authors: Mickael C. Santos, Cláudia Nunes, M. Angélica M. Rocha, Ana Rodrigues, Sílvia M. Rocha, Jorge A. Saraiva, Manuel A. Coimbra Abstract The impact of high hydrostatic pressure (HHP) treatments on volatile composition of sulphur dioxide-free wines during bottle storage was studied. For this purpose, white and red wines were produced without sulphur dioxide (SO2) …
Authors: Ahmad Omar-Ali, Claudia Hohn, Peter J. Allen, Jose Rodriguez, Lora Petrie-Hanson Abstract Alligator gar Atractosteus spatula acclimated to brackish water (9 ppt) were exposed to water accommodated fraction oil loadings (surrogate to Macondo Deepwater Horizon, northern Gulf of Mexico) of 0.5 and 4.0 gm oil/L tank water for 48 h. The surrogate oil was approximately 98% alkanes and …
Authors: Christoph H.WeinertBjörn Egert, Sabine E.Kulling Abstract Comprehensive two-dimensional gas chromatography mass spectrometry (GC × GC–MS) offers excellent chromatographic separation performance and superior sensitivity. As such, it is eminently suitable for the analysis of complex biological samples. The applicability of a GC × GC instrument equipped with a fast-scanning qMS detector for large-scale untargeted metabolome analyses was investigated. We …
Authors: Masaaki Ubukata, Karl J. Jobst, Eric J. Reiner, Stephen E. Reichenbach, Qingping Tao, Jiliang Hang, Zhanpin Wu, A. John Dane, Robert B. Cody Abstract Comprehensive two-dimensional gas chromatography (GC×GC) and high-resolution mass spectrometry (HRMS) offer the best possible separation of their respective techniques. Recent commercialization of combined GC×GC–HRMS systems offers new possibilities for the …
Authors: Christelle Planche, Jérémy Ratel, Frédéric Mercier, Patrick Blinet, Laurent Debrauwer, Erwan Engel Abstract This paper evaluates different multiresidue methods based on comprehensive two-dimensional gas chromatography coupled to time-of-flight mass spectrometry (GC × GC-TOF/MS) to analyze dioxin-related micropollutants in complex food matrices. In a first step, the column sets Rtx-PCB/BPX-50 and Rtx-Dioxin2/BPX-50 were compared in terms of …
