Mass chromatogram, odorant

FIGURE 3.9 Reconstructed mass chromatograms, a) Total ion current plot b) SIM plot c) Total ion chromatogram with full mass spectra. (From Holland, J.F., B.D. Gardner, Flavor, Fragrance, and Odor Analysis, R. Marsili, Ed., Marcel Dekker, New York, 2002, p. 107. With... 

Fig. 5.3. Odor changes that track floral color changes. Gas chromatography-mass spectrometry total ion chromatograms of floral headspace collected from young (upper trace) and old (lower trace) flowers of Lantana montevidense. Peaks 1,8,10, and 12 are metabolites of linalool (peak 3), all of which decrease dramatically with floral age and color change. Sesquiterpene hydrocarbons (peaks 4, 5, 9, and 11) show comparable decreases over time. Peaks 2, 6, 7, 13, and 14 are oxygenated aromatics and are present only in newly opened, rewarding flowers. Insert mass spectra highlight loss of phenylacetaldehyde ( peak 7) taken from young (a) and old (b) flowers. (M. R. Weiss and R. A. Raguso, unpublished data.)...

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