Identification of impact aroma compounds in Eugenia uniflora L. (Brazilian Pitanga) leaf essential oil

Journal of the Brazilian Chemical Society

Rosineia M. Melo¹  Vivian F. S. Corrêa¹  Ana Carolina L. Amorim¹  Ana Luisa P. Miranda¹  Claudia M. Rezende¹ 

[1] ,Universidade Federal do Rio de Janeiro Instituto de Química Rio de Janeiro RJ ,Brazil

关键词: Eugenia uniflora L.;    Myrtaceae;    gas chromatography olfatometry-mass spectrometry;    sesquiterpenes;    AEDA;   

DOI  :  10.1590/S0103-50532007000100020

来源: SciELO

【 摘 要 】

The leaf essential oil of Eugenia uniflora L. (Myrtaceae) was extracted by Clevenger apparatus and analysed by gas chromatography-mass spectrometry (GC-MS). The leaves were collected and immediately extracted for five consecutive days at 9:00 am and 2:00 pm. No variance in the oil yields were observed in the period. Furanodiene and its rearrangement product, furanoelemene (or curzerene, 50.2%), beta-elemene (5.9%) and alpha-cadinol (4.7%) were identified as the most abundant compounds. GC-Olfatometry (GC-O) associated to Aroma Extract Dilution Analysis (AEDA) allowed the identification of nine active aroma compounds, where furanodiene (along with furanoelemene, FD 1024), beta-elemene (FD 256) and (E,E)-germacrone (FD 256) were characterized as the main impact aroma compounds in the odor of this essential oil. Those substances were collected through a sniffing port adapted on the GC allowing to obtain a typical essence of pitanga as indicated by comparative olfatometric analysis.

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