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- W1510578058 abstract "Abstract Gas chromatography/infrared (GC/IR) spectroscopy coupling combines the separation power of high‐resolution gas chromatography (HRGC) to the highly specific identification technique, infrared (IR) spectroscopy, based on the absorption of IR radiation by the molecules. Relying on different molecular properties, IR is an excellent complement to mass spectrometry (MS) in structural analyses. For volatile compounds, the coupling of gas chromatography/mass spectrometry (GC/MS) has been the universal basic technique for a long time. The advantages of Fourier transform infrared spectrometry (FTIRS) allowed the coupling of gas chromatography (GC) to an FTIR (Fourier transform infrared) spectrometer, ending with a powerful tool, gas chromatography/Fourier transform infrared spectrometry (GC/FTIRS). The first device developed to interface a gas chromatograph to an FTIR spectrometer was a flow‐through gas cell, known as the light pipe (LP), delivering vapor‐phase IR spectra of eluting solutes. Two other cryogenic devices which allowed mobile‐phase elimination by trapping the compounds eluting from the GC at sub‐ambient temperature have been developed: the matrix isolation (MI) interface operating at 11 K and the direct deposition (DD) window operating at 77 K. Each of these three types of interface has advantages and drawbacks that are discussed in terms of sensitivity and specificity. Some selected applications in selected domains of analytical chemistry, i.e. environment, flavor and fragrances, pheromones and fatty acids, are presented and discussed again in terms of sensitivity and specificity according to the interface type used. Finally some concluding remarks on technique developments for GC/FTIRS and related techniques combining chromatography with IR spectroscopy are given." @default.
- W1510578058 created "2016-06-24" @default.
- W1510578058 creator A5007120881 @default.
- W1510578058 date "2000-10-30" @default.
- W1510578058 modified "2023-10-11" @default.
- W1510578058 title "Gas Chromatography/Infrared Spectroscopy" @default.
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- W1510578058 doi "https://doi.org/10.1002/9780470027318.a5604" @default.
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