Page 330 - Multidimensional Chromatography
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320                                     Multidimensional Chromatography





























































                           Figure 12.13 Illustration of isothermal dual capillary column chromatography used for sep-
                           aration of UV photolysis products of methyl isopropyl ether. (a) Heart-cut and back-flushing
                           at preseparation: chromatogram 1, PPG pre-column (20 m   0.25 mm i.d.); 55 °C, 0.2 bar
                           N 2 ; 3 L. Chromatogram 2, Marlophen main column (100 m   0.25 mm i.d.); 1.5 bar N 2 ;
                           sample, heart-cut from chromatogram 1. (b) Obtained under the same conditions as (a), but
                           without trapping of the heart-cut. Reprinted with permission from Ref. (19).
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