Identification of key aroma compounds from bitter orange (Citrus aurantium L.) products: essential oil and macerate–distillate extract

摘要: The volatile compounds of bitter orange (Citrus aurantium L.) products, essential oil (EO) and the heart cut (HC) distillate were detected quantified using gas chromatography (GC) coupled with a mass spectrometer flame ion- ization detector. flavour characterized GC-olfactometry by nine trained panellists fre- quency detection method. In total, 53 molecules in EO 40 HC. was 19 major odour (frequency from 6/9 to 9/9) different aromatic notes among which a-pinene (floral), octanal (green), limonene (citrus), linalool a-terpineol (indeterminate: 'ND', green), linalyl acetate (E,E) or (E,Z)-2,4-decadienal (frying), dodecanal (ND), caryophyllene (green) an unknown compound (I T =1678, plastic note). HC presented complex mixture several low concentrations, characterize flavour. seven high FD compounds, three them (myrcene, a-phellandrene, limonene) citrus mint notes, other four ((Z)-linalool oxide, a-terpinolene, neral) floral notes. comparison these two products brought light that overall process maceration/distillation could induce loss 15 strong odours previously found simple metal These results show macerating-distilling peels makes it possible select most pleasant while eliminating some off-odours present EO. This is first time characterization odour-active has been carried out on products. valuable information help for further investigation process/product optimization. Copyright © 2011 John Wiley & Sons, Ltd. Several studies detail composition part oil. percentage content monoterpene hydrocarbons varies 97.3% 97.8%, sesquiterpene have about 0.2%. Oxygenated between 1.8% 2.2%. Esters are main oxygenated class. Their ranges 0.8% 1.4%, carbonyl 0.35% 0.63% alcohols 0.33% 0.46%. component es- sential limonene, its being more than 93%. Among minor hydrocarbons, only myrcene al- ways exceeds 1%. Its 1.7% 1.8%, b- pinene Linalyl represents esters. Linalool alcohol decanal compounds. (4-13)