Journal
JOURNAL OF ESSENTIAL OIL BEARING PLANTS
Volume 10, Issue 2, Pages 109-120Publisher
TAYLOR & FRANCIS LTD
DOI: 10.1080/0972060X.2007.10643528
Keywords
citrus aurantium var amara; petitgrain oil; peel oil; seasonal variation; linalool; linalyl acetate; limonene
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The petitgrain and peel oil isolated by hydrodistillation from leaves and rind of Citrus aurantium L. var amara (Rutaceae) harvested monthly have been studied by GC-FID and GC-MS. Oxygenated monoterpenes were shown to be the predominance fraction (84.5-89.6%) of petitgrain oil and mainly composed of linalool (23.2-32.2%), linalyl acetate (33.2-41.6%), (x-terpineol (7.3-9%), geraniol (4.9-6.4%) and geranyl acetate (4.5-6.4%). On the contrary, oil obtained from peel consisted almost exclusively of monoterpene hydrocarbons, which alone varied from 90.1 to 95.6% of the total oil, with limonene as major oil constituent (87-92.2%). The maximum amount of monoterpene hydrocarbons of petitgrain and peel oil was found at the middle of the productive season (January-February). Whereas petitgrain samples collected in December were found to be relatively rich in oxygen-containing monoterpenes. The highest yield of petitgrain and peel oil was obtained from samples collected in May (0.9%) and January (1.3%) while the lowest was isolated from samples collected in March (0.5%) and February (0.8%) respectively.
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