The comparison of some of the most frequently used techniques
for the extraction of aroma compounds from buckwheat confirms
some of the strengths and drawbacks of individual approaches.
Only
one of the compounds with high OAV was confirmed by all techniques
(salicylaldehyde), although several were present in most
types of extracts (2-pentylfuran, phenylacetaldehyde, hexanal, limonene).
An important consideration should be the distinction between
the aroma of raw buckwheat, obtained by solvent
extraction and headspace techniques, and aroma of ‘‘cooked” buckwheat
obtained by SDE. Presence of certain compounds in the latter,
e.g. C6–C9 aldehydes and ketones, could be seen as an artifact formation
during heating although, in the particular case of buckwheat,
similar to other cereals (Sik Yang et al., 2008), the aroma of the
cooked foodstuff is probably more important than the raw flavour.
To conclude, the applied isolation techniques are complementary
in their ability to extract a representative aroma profile of
buckwheat as a whole, while SDE is the most promising regarding
the aroma of the cooked foodstuff