Robert Shellie from the Australian Centre for Research on Separation Science (ACROSS) at the University of Tasmania has taken over Coupling Matters from Robert Shellie.
 | November 1, 2009
By:Inge Dirinck, Isabelle Van Leuven, Patrick Dirinck
Mass spectrometry-based electronic nose technology (MS-nose technology) is a fast hyphenated technique for digital odour characterization of food and beverage products.
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May 1, 2009
By:Hans-Gerd Janssen, Filippo Bedani
Two-dimensional liquid chromatography (2D-LC) allows analysts to deal with complex samples that either cannot be adequately separated by one-dimensional liquid chromatography (1D-LC) or require excessively long analysis times. Peptide mixtures, whose characterization is relevant in many areas (e.g., proteomics, food analysis, pharmaceutical, life sciences), are a clear example of such complexity. An overview of the most used 2D-LC modes of operation is presented and several examples of their use for the separation of peptide mixtures are described.
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February 1, 2009
By:Michael P. Balogh
Part 2 of this three-part series focuses on comparing operation and performance of the most well known mass spectrometers.
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January 1, 2009
By:Philip J. Marriott, Weeraya Khummueng
The interpretation of comprehensive two-dimensional gas chromatography (GC×GC) based on the modulation ratio (MR) concept encompasses method implementation, ideas on quantitative measurement and how modulation phase affects GC×GC.
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November 1, 2008
By:Robert A. Shellie
Differential flow modulation is an inexpensive way to perform GC×GC separations which has been attracting growing attention recently. Differential flow modulation uses high carrier gas flow rates in the second dimension column so it is widely thought that this rules out direct coupling with mass spectrometry. However direct coupled GC×GC-QPMS using differential flow modulation is reported here for the first time using an unmodified mass spectrometer comprising a dual inlet turbomolecular pump and fast scanning quadrupole mass analyser. The suitability of the approach for characterization of essential oils is demonstrated.
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