Journal
JOURNAL OF THE BRAZILIAN CHEMICAL SOCIETY
Volume 18, Issue 1, Pages 179-183Publisher
SOC BRASILEIRA QUIMICA
DOI: 10.1590/S0103-50532007000100020
Keywords
Eugenia uniflora L; Myrtaceae; gas chromatography olfatometry-mass spectrometry; sesquiterpenes; AEDA
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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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