Characterization of the Eucalyptus ( E. Globulus) Leaves Oil

Abstract

Studies were carried out on the characterization of Eucalyptus globulus leaves oil. It is found that Eucalyptus globulus tree bears a lot of leaves which are grown under the soil texture and climatic condition of Bangladesh contain a fair amount of pale yellow coloured volatile oil. The oil of the leaves were extracted by hydro distillation method during the month of July to December. The highest yield (3.5%) of the oil was obtained from the maturity leaves of the tree in the month of July and the lowest yield (0.08) in the month of December. Physico-chemical characteristics of the extracted oil like saponification value, acid value, iodine value, specific gravity, refractive index, optical rotation and separation of lipid classes were studied by the conventional methods and the results suggested that the oil can be used suitably for the preparation of pharmaceutical and industrial products. DOI: http://dx.doi.org/10.3329/jbcs.v25i1.11780 Journal of Bangladesh Chemical Society, Vol. 25(2),97-100, 2012

Investigation of Essential Oil Composition Variation with Age of Eucalyptus globulus Growing in Ethiopia

“…Components such as 1, 8-cineole was found to be the dominant and its percentage composition is agreement with the same tree species reported in other region of the world[25]. Different percentages of 1, 8-cineole in E. globulus leaf oil have been mentioned in the literature: 51.08% in Algeria, 62.38%-5.37 in Ethiopia, 67% in Bangladesh, 54.79% in India[25][26][27][28], 72.71% in China[30] in which variation might be due to different agroecological zones and other factors. Our finding suggests that as the age of the plant increases, percentage composition of 1, 8cineole increases whereas percentage composition of Alpha-Pinene (the second most dominant compound) decreases as shown in Table2.…”

“…Several reports also shows similar trends in Eucalyptus globulus essential oil yields. For example 0.8-1.21% of essential oil (w/w, based on the fresh weight of the mature leaves) in Ethiopia [25], 1.87% of essential oil (w/w, based on the fresh weight of the leaves) in Algeria [26], 0.08-3.5% of essential oil (w/w, based on the fresh weight of the mature leaves) in Bangladesh [27], 1.1% of essential oil (w/w, based on the fresh weight of the mature leaves) in India [28]. It is noted that there are several factors that affect the yields of Eucalyptus oils such as tree age, leaf age, altitude, season, harvest time and fertilizer [29].…”

Comparison of fractionation techniques of CO2 extracts from Eucalyptus globulus – Composition and insecticidal activity

“…Eucalyptus leaves are rich sources of essential oil, flavonoids or tanins [2], which are responsible for their antibacterial [3], larvicidal [4] and fumigant [5,6] activities. Yield of E. globulus essential oil, with the major compounds 1,8-cineole (eucalyptol), aromadendrene, globulol and pinene, depending on environmental and agronomic factors, ranges from 0.8 to 3.5 wt% [7][8][9]. Kumar et al [10] investigated insecticidal activity of E. globulus essential oil against housefly (Musca domestica) larvae.…”