Browsing by Subject "Gas chromatography–olfactometry (GC–O)"

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    Characterization of the major odor-active compounds in fresh rhizomes and leaves of Houttuynia cordata by comparative aroma extract dilution analysis
    (2025) Xu, Zhenli; Liu, Jing; Kreissl, Johanna; Oellig, Claudia; Vetter, Walter; Steinhaus, Martin; Frank, Stephanie; Rodov, Victor
    Houttuynia cordata is a culinary herb from Asia. Its edible rhizomes and leaves have a fishy aroma, the molecular background of which was unknown. A comparative aroma extract dilution analysis applied to fresh rhizomes and leaves resulted in 44 and 41 odorants, respectively, 38 of which were present with FD factors ≥1 in both samples. The odorant with the highest FD factors, whether in the rhizomes or leaves, was identified as metallic, soapy, fishy smelling 3-oxododecanal. Toward clarifying its tautomeric composition, quantum calculations suggested a predominance of the enol forms in the plant. However, the form perceived at the sniffing port during GC–O remained unclear.