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GCxGC-uECD combined with fast sample preparation methods for the simultaneous screening of selected POP families in food samples

AuthorsBordajandi, Luisa R.; Ramos, Juan José ; Sanz Perucha, Jesús ; González, María José; Ramos, Lourdes
Issue Date2005
CitationOrganohalogen Compounds 67: 91-94 (2005)
AbstractComprehensive two-dimensional gas chromatography (GC×GC) is a powerful separation technique in which two GC columns with different separation mechanism are coupled via an interface called modulator. This modulator is used to focus and efficiently transfer (i.e. re-inject) the entire effluent from the first column into the second one as consecutive narrow chromatographic bands. Parameters affecting the modulation step such as the cold and hot jet temperatures and the modulation frequency should be carefully optimised to preserve the separation achieved in the first column through the entire separation run. The fast GC separation that takes place in the second column depends on the nature of this stationary phase, its length and the offset of temperature between this column and the main oven. The main features of GC×GC, the influence of the experimental parameters in the final peak capacity and separation power as well as the main advantages of GC×GC as compared to other multidimensional chromatographic separation techniques have been discussed in a number of reviews.
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