Page 18 - Shimadzu Journal vol.3 Issue2

Flavor Release Evaluation

1) 3)

4)

2)

5)

Fig. 3 Migration of thymol in the case of foil-roasted cod fish with fresh thyme
1) Image of cod fish with fresh thyme leaves before roasting in a foil. 2) Image of foil-roasted cod fish with fresh thyme leaves. a, b, and c denote the
sampled points for DMI-GC/MS analysis. 3), 4), and 5) show TICCs of the sampled points a, b, and c, respectively. For DMI-GC/MS analysis, the amount of
each sample was 2 mg.

2. The odor-active compounds localized in coriander leaves and roots
– An odor-active compound (E)-2-dodecenal localized in vines –
8,9
Coriander plants are known to contain two major odor-active compounds: (E)-2-dodecenal and (E)-2-tetradecenal. In
particular, (E)-2-dodecenal has a strong odor. Coriander plants are commonly used in salads: Leaves are used in salads,
while their roots are used as a flavor dressing. We confirmed the odor-active compounds localized in a leaf and a root.
Furthermore, we employed DMI-GC/MS to analyze the aroma of prepared foods, e.g., the localization of the aroma
compounds in coriander leaves and roots.

Sample preparation Results and discussion

Fig. 4 shows the sample preparation of the coriander leaves for Coriander leaves and roots were subjected to DMI-GC/MS analyses.
DMI-GC/MS analysis. The sample preparation was the same as The results indicated that the vines of the coriander leaf contain a
those employed for the DMI-GC/MS measurement of foil-roasted majority of (E)-2-dodecenal (Figs. 5 and 6). This result suggests that
cod fish with thyme. (E)-2-dodecenal is possibly distributed non-uniformly in the
Furthermore, we employed DMI-GC/MS to analyze the localization coriander leaf, thereby imparting a good taste. On the other hand,
of the aroma compound from a micro viewpoint. the surfaces of the coriander root contain both (E)-2-dodecenal
and (E)-2-tetradecenal (Fig. 7). Hence, coriander roots are possibly
GC/MS analysis better for use as a flavor dressing, because the odor-active
compounds of the coriander roots migrate into the dressing
The GC/MS conditions were the same as those employed for the effectively.
DMI-GC/MS measurement of foil-roasted cod fish with thyme.

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