1 research outputs found
A Vacuum Ultraviolet Absorption Array Spectrometer as a Selective Detector for Comprehensive Two-Dimensional Gas Chromatography: Concept and First Results
Fast and selective detectors are
very interesting for comprehensive
two-dimensional gas chromatography (GC × GC). This is particularly
true if the detector system can provide additional spectroscopic information
on the compound structure and/or functionality. Other than mass spectrometry
(MS), only optical spectroscopic detectors are able to provide selective
spectral information. However, until present the application of optical
spectroscopy technologies as universal detectors for GC × GC
has been restricted mainly due to physical limitations such as insufficient
acquisition speed or high detection limits. A recently developed simultaneous-detection
spectrometer working in the vacuum ultraviolet (VUV) region of 125–240
nm overcomes these limitations and meets all the criteria of a universal
detector for GC × GC. Peak shape and chromatographic resolution
is preserved and unique spectral information, complementary to mass
spectrometry data, is gained. The power of this detector is quickly
recognized as it has the ability to discriminate between isomeric
compounds or difficult to separate structurally related isobaric species;
thus, it provides additional selectivity. A further promising feature
of this detector is the data analysis concept of spectral filtering,
which is accomplished by targeting special electronic transitions
that allows for a fast screening of GC × GC chromatograms for
designated compound classes