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Foods, Flavours and Fragrances Applications                     239


























































                           Figure 10.12 (a) LC separation of bergamot oil (305 nm), where the fraction of interest is
                           completely transferred into the GC unit; (b) GC separation (column HP-5, 25 m   0.32 mm
                           i.d., 0.52   m  film thickness) of the fraction using an FID, and (c) using FTIR detection
                                            1
                           (SWC 1776–1779 cm ). Peak identification is as follows: (1) 7-methoxycoumarin (internal
                           standard); (2) citropten; (3) bergapten. Reprinted from  Journal of High Resolution
                           Chromatography, 14, G. Full et al., ‘On-line coupled HPLC–HRGC: A powerful tool for
                           vapor phase FTIR analysis (LC–GC–FTIR)’, pp. 160–163, 1991, with permission from
                           Wiley-VCH.
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